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Before You Start
When your plastic items are dull, dated, or just thoroughly unappealing, is there anything you can do to enliven them? By painting your plastic materials, you can make them sparkle like new with fresh colors.
Plastic has long been regarded as a tricky material to paint. Paint tends to drip, pool, and blotch; once dried, it quickly peels off. But paint manufacturers, having since learned that plastic is a way of modern life, have developed special spray paints that lay down smoother, stick well,... and resist peeling. Common purpose spray paints are still acceptable, but care must be taken to prepare the surface prior to painting.
Should You Use Special Spray Paint for Plastics?
For the sake of convenience, you may wish to use a spray paint labeled as being specifically for plastics, like Krylon Fusion for Plastic or Rust-Oleum Specialty Paint for Plastic Spray.
In many cases, though, you can use a general purpose spray paint, such as Krylon Paint + Primer or Rust-Oleum Universal Spray Paint. General purpose spray paints offer vastly far more color choices than do specialty plastic paints. Even though these general purpose paints are not prominently labeled as being for plastic, manufacturer specifications typically do state that they are suitable for plastics.
Tools and Materials
Continue to 2 of 6 below.
- Spray paint
- Mineral spirits
- Bucket of warm, soapy water
- Scrub brush
- Latex or nitrile gloves
- Fine grain sandpaper
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Clean the SurfaceContinue to 3 of 6 below.
03 of 06
Sand Glossy Surface
Paint adheres far better to rougher matte surface plastics than to glossy plastics. Since most plastic is glossy, sanding is then an essential step. Since plastic is soft, you can do the sanding by hand. However, if you have large sections of plastic to sand, you may want to use an electric random orbital sander.
Use #180 to #100 fine grit sandpaper for most clean plastics. If the plastic needs more cleaning than the soapy water could provide, you can begin with sandpaper in the grittier #80 to... #60 range, then move up to the finer grit sandpaper.Continue to 4 of 6 below.
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Wipe Down With Mineral Spirits
A final cleaning with mineral spirits or isopropyl alcohol is crucial, as this will remove the fine plastic dust produced by the sanding. Take the plastic material to a well ventilated but protected area, such as under a patio awning or outdoors on a dry day.
Put on the latex or nitrile gloves. Drip the spirits or alcohol onto a clean rag and wipe down the surface. Do this as many times as necessary, until the rags come up clean and dust-free. Check local waste management regulations for guidance... on disposing of rags soaked with mineral spirits.Continue to 5 of 6 below.
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First Spray Coat
Extreme patience wins the game when spray painting plastic. If you are accustomed to laying down one or two coats on wood, paper, or cardboard, plastic is an entirely different material to work with because it is not porous and does not absorb paint.
If possible, lay the work material flat (horizontally). Thoroughly shake the can until the mixing ball moves throughout the can. Test-spray off to the side, into the air, or on a piece of scrap material, until the paint sprays freely and finely.
Hold... the can between 8 and 12 inches away from the plastic, with the can tilted down at about a 45-degree angle. Spray lightly across the surface. Do not aim for total color coverage at this point, as that will usually lead to drips.Continue to 6 of 6 below.
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Spray Subsequent Coats of Paint
Let the plastic dry for at least a couple of hours. The paint should feel solid and dry to the touch, not tacky.
If there are a few dried-on drips and drops, you can sand them down flat. For this, the paint has to be 100-percent dry and hard. Otherwise, you might end up with smeared paint that is difficult to remove.
Paint the plastic with a second coat, the same as the previous step. As before, resist the temptation to lay down a thick coat of paint. Keep the paint can tilted at an angle and... lightly mist the surface between 8 and 12 inches away. Spraying from too far away can actually be counter-productive, as you end up with a dusty, grainy coat of paint that is difficult to paint over.
After letting the plastic material dry for at least a couple of hours, give the surface a final coat of paint.