How Much Spray Paint is Needed for a Metal File Cabinet
Painting a metal file cabinet can give it a fresh, updated look and allow you to customize it to match your décor. However, determining how much spray paint to buy for the project can be tricky. Here is a comprehensive guide on how to calculate the amount of spray paint needed to paint a metal file cabinet.
Introduction
Painting a metal file cabinet is a relatively easy DIY project that can make a big difference in the look of an office, garage, or any other space. With a coat of colorful spray paint, you can transform a worn-out, dated cabinet into one that looks stylish and new.
However, one of the key steps is figuring out precisely how much spray paint you will need to fully cover the cabinet. You want to make sure you buy enough to complete the job, while also avoiding buying too much excess paint. Factoring in the size of the cabinet, the number of coats needed, and the typical coverage of spray paint will allow you to determine the right quantity to purchase.
This article provides a step-by-step guide to calculating how much spray paint is required to paint any metal file cabinet. Following these tips will ensure your painting project goes smoothly and you achieve the upgraded look you want.
Step 1: Measure the Surface Area of the File Cabinet
The starting point for figuring out how much spray paint you need is calculating the total surface area of the file cabinet you will be painting. This determines the total square footage that will need to be covered in paint.
To measure surface area, you will need to measure the height, width, and depth of each side of the cabinet – the top, sides, back, front, and interior shelves if painting those as well. Note down the measurements in inches for each side.
For example, if your file cabinet has these dimensions:
- Height: 60 inches
- Width: 30 inches
- Depth: 20 inches
Then the measurements for each side would be:
- Top: 30 x 20 = 600 sq in
- Front: 60 x 30 = 1800 sq in
- Side 1: 60 x 20 = 1200 sq in
- Side 2: 60 x 20 = 1200 sq in
- Back: 60 x 30 = 1800 sq in
- 2 Shelves at: 30 x 20 = 600 sq in each, so 1200 sq in total
Add up the square inches for each side to get the total surface area. For this example cabinet, the total would be:
- Top: 600 sq in
- Front: 1800 sq in
- Side 1: 1200 sq in
- Side 2: 1200 sq in
- Back: 1800 sq in
- Shelves: 1200 sq in
- Total = 7800 sq in
Once you have the overall square inches, you can now determine how much paint is needed.
Step 2: Calculate Square Feet
Spray paint coverage is usually measured in square feet, so you will need to convert the total square inches into square feet.
To do this, simply divide the total square inches by 144. There are 144 square inches in 1 square foot.
For our example, 7800 sq in / 144 = 54 sq ft
This is the total square footage that will need to be spray painted for full coverage.
Step 3: Consider the Number of Coats Needed
The amount of paint needed will depend on how many coats of spray paint you plan on applying.
Most small metal furniture and file cabinets require 2-3 thin coats of spray paint for full, even coverage and an opaque finished look.
If applying 3 thin coats, you would need to multiply the square footage by 3.
For our example cabinet:
- 54 sq ft x 3 coats = 162 sq ft to be painted
If opting for only 2 coats, then multiply by 2 instead:
- 54 sq ft x 2 coats = 108 sq ft to be painted
Consider the condition of the original surface when deciding on 2 or 3 coats. If it is already painted and in good shape, 2 may suffice. For worn or damaged surfaces, 3 thinner coats tend to work best.
Step 4: Check Recommended Coverage of the Paint
The final factor to consider is the expected coverage of the specific spray paint you plan to use.
Most spray paints will indicate square foot coverage on their labels or spec sheets. For general guide:
- Rustoleum spray paint covers 10-15 sq ft per can
- Krylon spray paint covers 12 sq ft per can
- Generic brands cover 8-12 sq ft per can
Check your chosen spray paint for the manufacturer’s recommendation, then divide your total square footage by the paint’s coverage.
For example, if using Rustoleum that covers 15 sq ft per can:
- 162 sq ft total needed / 15 sq ft per can = 11 cans
Round up to the nearest full can to ensure having a sufficient amount. Certain colors or finishes may require more coats and more paint than the recommendations.
Buying the Right Amount of Spray Paint Cans
Following the steps above will produce a reliable calculation of how many cans of spray paint you should purchase for your specific filing cabinet painting project.
Buy the full amount calculated, rather than trying to save money on paint. Coming up short partway through a paint job is incredibly frustrating. It can result in mismatched colors or having to run back to the store.
For best results, buy all the spray paint cans you will need in one brand, color, and finish. Keep your receipt in case any cans get damaged or are defective. Test out spray painting on an inconspicuous corner first before beginning full application.
Proper prep work like sanding and cleaning the cabinet is also key for achieving an even, professional spray painted finish. Be patient, apply thin coats, and allow for full drying time between each application.
With the right amount of high-quality spray paint and good technique, you can easily give tired metal file cabinets an amazing makeover.
Frequently Asked Questions About How Much Spray Paint is Needed for a Metal File Cabinet
Here are answers to some common questions about calculating and buying the right amount of spray paint for DIY metal file cabinet painting projects:
How many coats of spray paint are needed for metal file cabinets?
2-3 thin coats are generally recommended for full coverage on metal file cabinets. The thinner each coat, the smoother and more even the final finish.
Should I use gloss, satin, or matte spray paint on metal filing cabinets?
This depends on personal preference, but satin or matte finishes often look best on filing cabinets. Gloss shows imperfections more, while satin or matte offer an attractive subtle sheen.
How long should I let spray paint dry between coats on a metal cabinet?
Follow the manufacturer’s recommendations, but typically you should let each coat dry for at least 1-2 hours before applying the next coat. Proper drying results in the most durable finish.
What is the fastest drying spray paint for metal filing cabinets?
Krylon Fusion All-In-One spray paint dries to the touch in as little as 15 minutes. Rustoleum Professional Ultra Cover also dries quickly. Look for “fast drying” formulas if short on time.
Should I sand metal filing cabinets before spray painting?
Lightly sanding with 220 grit sandpaper will help paint adhere best. Sand just enough to rough up the surface and remove any gloss or clear coats from prior paint jobs. Wipe clean before painting.
How do I get an even, smooth spray paint finish on metal cabinets?
Use light, quick strokes and keep the can 10-12 inches from the surface. Apply multiple thin coats rather than trying to achieve full coverage in one thick coat. Always follow the product label instructions.
Can I use spray paint on plastic laminate filing cabinets?
Yes, but an adhesion promoter must be applied first for proper bonding. Lightly scuff the plastic surface before painting as well for the paint to grip.
What kind of spray paint is best for metal filing cabinets and drawers?
Rust-Oleum and Krylon specialty spray paints designed for metal are recommended. Look for paints that offer rust prevention and maximum durability to withstand daily office use.
Conclusion
Determining how much spray paint your filing cabinet project requires doesn’t need to be a guesswork hassle. Follow this simple step-by-step guide to calculate the total surface area, square footage with coats, and the right number cans needed for full coverage.
Buy quality primer and spray paint suited for metal, and properly prepare the filing cabinet surface before painting. With the right amount of product and proper application, you can expect an attractive, long-lasting spray painted finish.
Transform that outdated metal cabinet with a vibrant makeover using your color and sheen of choice – just be sure to buy enough spray paint on the first try!
