How to Restore an Old Metal Sink Cabinet

Restoring an old metal sink cabinet can breathe new life into a dated or worn-out kitchen. With some cleaning, repairs, paint and new hardware, that antique cabinet can become a beautiful focal point in your kitchen again. This comprehensive guide will walk you through all the steps needed to restore your metal sink cabinet to its former glory.

Assessing the Cabinet Condition

Before starting any restoration work, you’ll need to thoroughly examine the current state of the metal cabinet. This will help you identify what needs to be addressed in the restoration process.

Check for Rust

Inspect inside and out for any rust spots or flaking paint. Rust can quickly spread and damage the integrity of the metal if left untreated.

Light surface rust may be able to be removed with a wire brush or sandpaper. But deep, pitted rust will likely require special rust converter chemicals applied before priming and painting.

Test for Loose Joints

Wiggle doors, drawers and hinges to check for any looseness. Old cabinet joints can come loose over years of use. These will need to be tightened for proper functioning after restoration.

Use a screwdriver to inspect inside joints and tighten any loose screws. If screws are stripped or missing, they will need to be replaced.

Look for Previous Repairs

Check if there have been any repairs done previously, such as reinforcement patches or hardware replacements. This may impact how you approach certain steps in the restoration.

Pay attention to signs of amateur repairs, as these may need re-done properly. But quality previous repairs can likely be left alone.

Check for Levelness

Use a level tool on both the cabinet top and base. Over time, settling of the flooring or roof may have caused the cabinet to become unlevel.

Proper leveling is important both functionally and aesthetically for the finished product. Unlevel cabinets may require shimming or adjusting feet.

Assess Hardware

Take note of any missing, damaged or dated hardware like hinges, handles, latches or shelf brackets. These will likely need to be replaced with new hardware.

Salvage and reuse any viable vintage hardware that adds to the antique appeal. But replace worn or defective hardware.

Check Plumbing Condition

Inspect any existing sink, faucet, drain or supply lines for leaks, corrosion and proper functioning. These may require repairs or complete replacement.

Turn on the water supply and check for leaks underneath the cabinet or around sinks/faucets.

Cleaning and Repairs

Once you’ve thoroughly assessed the cabinet’s overall condition, the next step is cleaning it up and making any needed repairs prior to painting.

Remove Sink and Hardware

Detach any sinks, faucets, handles and other removable hardware. Set them aside for later reinstallation or replacement. This allows you to fully access the cabinet for repairs.

Plug any faucet holes or open drain lines to prevent debris falling in during the cleaning process.

Clean Inside and Out

Give the metal cabinet a thorough cleaning from top to bottom before making repairs. Buildup of dirt, grease and grime can prevent paint and finishes from properly adhering.

Use a degreasing agent like TSP substitute to clean off cooking oils or greasy residue. For dirt or soot, scrub with a soap solution.

Be sure to remove any old caulk, adhesive or sealants adhering around sinks or along walls and countertops. These need to be re-applied later.

Sand Away Rust

Use coarser 80-100 grit sandpaper to sand away any light surface rust until you expose clean metal again. Wipe away any rust residue.

For deeper rust, apply a chemical rust converter to stabilize the metal before sanding and painting. Rust-Oleum and Permatex make reliable conversion formulas.

Patch Holes

Fill any holes, gaps or imperfections with auto body filler, wood filler or epoxy. Allow proper drying/curing time before sanding smooth.

Larger holes may need to be patched with metal plates, reinforcement bars or mesh screen behind the filler for durability.

Tighten Joints

Reinforce any loose or wobbly joints using wood glue and extra screws. Inject wood glue into the gap with a syringe and clamp tightly until cured.

Drill pilot holes and install longer cabinet screws for better grip. Use fender washers for extra reinforcement if needed.

Replace Defective Parts

If certain cabinet parts are too damaged or defective beyond repair, you may need to replace them. Download schematics from the manufacturer if possible.

Make replacements from wood, sheet metal or metal tubes cut and joined to match the original pieces.

Install New Hardware

Replace any old, worn-out hardware like hinges, latches, handles and shelf brackets. See the hardware section below for tips on selecting suitable new hardware.

Reuse or update any vintage hardware you want to keep. Make sure pieces operate smoothly.

Priming and Painting

Once all cleaning and repairs are complete, properly prep and paint the metal cabinet for long-lasting protection and beauty.

Remove Doors and Drawers

Detach all cabinet doors, drawers and other removable parts. This allows for easier access to all cabinet surfaces during painting.

Label parts so you can reattach them correctly later. Use painter’s tape for labelling.

Scuff Sand the Metal

Lightly scuff sand all cabinet surfaces with 150-220 grit sandpaper to rough up the metal for painting. This helps the paint adhere properly.

Use a palm sander for sanding large flat areas. Hand sanding is better for curved areas. Completely remove any glossy sheen.

Clean and Degrease Again

Give the sanded metal a final thorough cleaning before painting. Remove all dust, dirt and oily residue for best paint adhesion.

Tack cloth works great for picking up fine dust after sanding. Avoid re-handling cleaned parts.

Apply Rust-Inhibiting Primer

Spray on 1-2 even coats of oil-based metal primer, allowing proper dry time between coats. Rust-inhibiting primers provide an extra protective base layer.

Hang cabinet parts from hooks or set on paint cans for easier spraying. Only prime what you can paint over on the same day.

Paint with High-Quality Enamel

Apply 2-3 smooth, even coats of a hard, glossy enamel spray paint. Lightly sand between coats for maximum durability.

Oil-based enamel offers an extremely durable and smooth factory-like finish, but requires mineral spirits cleanup. Water-based is easier cleanup.

Reinstall Doors and Hardware

Once fully cured, reattach the doors, drawers, and hardware back onto the cabinet. Follow any previous labeling for correct placement.

Adjust hinges so doors sit flat and even. Install drawer glides if needed. Attach new handles and latches.

Selecting New Hardware

Carefully chosen new hardware can really modernize the look or add vintage appeal. Stay consistent throughout the cabinet for a cohesive style.

Hinges

Consider semi-concealed hinges for adjustable door alignment. Concealed hinges hide away inside the cabinet.

Strap hinges offer adjustable positioning. Go for black iron, brass or chrome finishes.

Handles

Look for durable metal pulls, knobs or handles that will withstand daily use. Porcelain, wood or leather can also add style.

Match any existing vintage hardware finishes like unlacquered brass, chrome or black iron if desired.

Latches

Magnetic touch latches allow cabinet doors to smoothly open and self-close. They offer a modern, minimalist look.

Vintage-style spring latches, roller catches or pulls add nostalgic charm. Make sure mechanisms slide smoothly.

Shelf Brackets

Look for sturdy metal brackets designed to hold up weight of cabinet contents without sagging.

Standard steel brackets work for most applications. Ornate wrought iron adds antique flair.

Towel Bars

Consider adding a small rail or bar for draping kitchen towels. Opt for brackets that neatly tuck against the cabinet side.

Match the finish of other hardware like chrome, bronze or matte black. Wood bars complement vintage styles.

Drawer Glides

Upgrade old sticky drawers with new side-mount glides for smooth motion and full extension. Look for durable ball bearing action.

Soft-close glides prevent noisy slamming. Go for slow-closing if concerned about crushing fingers.

Restoring Vintage Sinks, Faucets and Plumbing

Some of the vintage charm of old metal cabinets lies in old porcelain sinks and faucets. Restore these to prolong their life rather than replacing.

Clean and Reglaze Porcelain

Clear away old caulk, rust stains and mineral deposits with vinegar or bathroom cleaner. Use fine sandpaper to smooth chips.

Hire a pro to apply new porcelain glaze coating to restore the glossy finish. Several glaze colors are available.

Soak Stuck Faucet Parts

Loosen stuck faucet nuts, valves and mineral deposits by soaking in white vinegar or penetrating oils for several hours.

Scrub away any remaining grit with an old toothbrush. Rinse thoroughly.

Replace Rubber Washers and Gaskets

If faucets drip, the old rubber washers or O-rings are likely worn out. Replace them with new rubber parts matching the old ones.

Use Teflon tape or pipe sealant when re-assembling to prevent leaks.

Update Supply Lines

Replace any old galvanized supply lines with new flexible braided stainless steel supply hoses. Ensure a snug, leak-free fit.

Add in-line valves near supply hookups for conveniently shutting off water to the sink for repairs.

Update Drain Lines

Consider swapping out old iron drain pipes for new PVC lines. Join pieces with the proper cements and fittings.

Use a tubular PVC drain pipe system for easier do-it-yourself installation.

Refinishing and Protecting the Cabinet Exterior

Proper finishing protects your cabinet makeover for many years while providing beautiful rustic or vintage appeal.

Stain or Gel Stain

For a natural wood look, use wiping or gel stains in the color intensity you desire. Multiple coats build up darker tones.

Use a pre-stain conditioner for a more uniform stain absorption on metal. Apply polyurethane over the stain for protection.

Clear Coats

A clear gloss or satin polyurethane, varnish, shellac or lacquer seals the paint and provides a smooth finished look.

Apply 2-3 thin, even coats. Lightly sand between coats for best durability and adhesion.

Rub Through Technique

For a worn, antiqued effect, rub through some of the topcoat after it partially dries to reveal paint layers underneath.

Work in small sections using extra-fine sandpaper or steel wool. Distress edges and corners more for a realistic look.

Wax Finish

For extra vibrance and luster, apply paste wax or liquid polishing wax as a final topcoat. Buff it to a high shine.

Renew the glossy wax layer regularly to maintain the finish over time. Avoid wax on walking surfaces.

Painted Accents

Consider hand-painting decorative accents in a contrasting color like borders along walls or edges, flourishes on doors or artwork on the cabinet backsplash.

Use painter’s tape and a small brush to neatly paint lines and designs. Remove tape immediately after painting.

Restoration Checklist Summary

Follow this complete metal sink cabinet restoration checklist:

• Inspect closely and assess condition
• Remove sink, faucet and hardware
• Clean inside and out thoroughly
• Sand and treat any rust
• Repair holes and defects
• Tighten/reinforce loose joints
• Replace any defective parts
• Install new hardware like hinges and handles
• Detach doors and removable parts
• Sand, degrease, and apply primer
• Paint with gloss enamel
• Reinstall doors and hardware
• Restore vintage sink and faucet
• Apply protective clear coats
• Add decorative painted accents

With some diligent elbow grease and TLC, you can restore that worn-out cabinet into a stunning focal point and heirloom piece. Just take it one step at a time. Before you know it, you’ll have a beautiful rustic antique cabinet that looks at home in both modern and traditional kitchens.

Frequently Asked Questions About Restoring Metal Sink Cabinets

Many common questions come up regarding restoring vintage metal cabinets. Here are answers to some of the most frequently asked questions.

What types of metal are old sinks and cabinets usually made of?

Vintage metal cabinets and sinks were commonly constructed from porcelain-coated steel, cast iron, galvanized tin, copper or zinc. Porcelain is usually paired with steel or cast iron.

What’s the best way to remove rust from old metal cabinets?

Light surface rust can be removed by sanding and scuffing with an abrasive pad or sandpaper. For heavier rust, use a chemical rust converter before sanding and painting.

What should I use to clean grease and grime from cabinets?

An all-purpose degreasing cleaner like TSP substitute works extremely well to cut through old grease and dirt buildup on cabinets. Avoid harsh abrasives.

How do I stop cabinets from rusting again after restoration?

Choose a high-quality rust-inhibiting metal primer before painting, then use a durable satin or gloss enamel topcoat for protection. Avoid humidity and moisture.

How can I give my freshly painted cabinets an antique worn look?

Use a finish removal technique like “rub through” where you rub off some of the topcoat after partial drying to expose the paint layers underneath in an irregular aged pattern.

What’s the best way to repair cracked porcelain sinks?

Deep cracks and chips in porcelain sinks can be repaired by using a two-part epoxy filler made for poncelain repairs, then refinishing. Severe damage may require professional reglazing.

Should I re-caulk around sinks after restoring cabinets?

Yes, you should always apply fresh waterproof silicone caulk around sinks, faucets, countertops, walls and backsplashes after doing any cabinet restoration work.

Where can I find suitable vintage-style hardware like hinges?

Check antique stores, salvage shops or online retailers that specialize in antique reproduction hardware fixtures. Or remove vintage hardware from door and dresser projects.

How do I get rid of musty smells inside cabinets?

Washing all interior surfaces with a borax solution helps eliminate odors inside cabinets. Baking soda left for several days also absorbs stubborn smells. Improve kitchen ventilation.

Can I convert old metal cabinets to have soft-close doors?

Yes, you can upgrade old cabinets to soft-close doors using modern hinges and hardware designed to slow and cushion the door just before closing. This prevents slamming.

Conclusion

Restoring an old metal sink cabinet may seem like a big project, but it’s extremely rewarding to turn dilapidated furniture into beautiful showpieces. With some time, effort and creativity, you can refurbish cabinets into stunning functional fixtures full of vintage appeal and antique charm.

Just take the restoration process step-by-step. Properly assess the cabinet, make any needed structural repairs, apply fresh paint or finishes, replace worn hardware, and protect your work with clear coats. With the right techniques and products, you can revive cherished old cabinets and save these timeless pieces.

In no time, you’ll have a fully restored statement piece to become the envy of your family and friends. So don’t be intimidated to take on metal cabinet restorations. Roll up your sleeves and let that antique furniture shine again!