Last updated on April 13th, 2026 at 12:44 am
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Spray painting an RC car body is a simple way to refresh its look, and the cleanest results usually come from careful prep, light coats, and enough drying time.
The biggest problems are easy to avoid: using the wrong paint for the body material, leaving oil or dust on the shell, and spraying too heavily. RC bodies made from Lexan or other polycarbonate plastics usually do best with paint made for those shells, while generic spray paint or automotive paint may work in some cases but can give mixed results.
Take your time with the surface prep and let the paint build up slowly. That is what keeps the color even and helps the finish stick without peeling or running.
What you need before you start
Before you open the can, gather the basics and make sure the body is ready for paint.
- Spray paint made for Lexan or polycarbonate RC bodies
- Warm water and mild soap
- A soft cloth or paper towel for drying
- Very fine sandpaper or steel wool for a light scuff, if needed
- Cardboard or paper for a test spray
- Warm water for warming the can safely
If you want a paint comparison first, the 3 paints for RC car bodies is a useful place to narrow down your options.
Step-by-step process
1. Choose the right paint
Start with paint that matches the body material. For Lexan and other polycarbonate bodies, RC body paint is the safest bet. Some hobbyists have decent results with off-the-shelf spray paint or automotive paint, but if this is your first body, sticking with RC-specific spray paint is usually the cleaner choice.
If you are working on a foam shell or another specialty body, check the label and make sure the paint is compatible before spraying.
2. Wash and dry the body
Wash the body with warm, soapy water and dry it thoroughly before you paint. This step matters because even a thin film of oil can keep paint from sticking.
Handle the shell from the inside when you can so you do not leave fingerprints or skin oils on the surface that will be painted.
3. Lightly scuff the surface if needed
If you are using paint that is not made specifically for Lexan, a very light scuff can help it grip better. Use very fine sandpaper or steel wool and keep the pressure gentle.
Do not dig in or leave deep scratches. Those marks can show through the paint. Also avoid scuffing windows or any other area you plan to leave clear.
For shell handling and material basics, RC body basics is a helpful reference to keep nearby.
4. Shake the can well
Shake the can for the full time listed on the label. That helps mix the paint properly and gives you a more even finish.
Skipping this step can leave you with weak color or splatter that ruins the first coat.
5. Warm the can safely
Spray paint flows better when it is around 70° Fahrenheit. You can let the can sit indoors for a couple of days or stand it in warm water for a short time.
Use warm water only, not hot water. Do not overheat the can. A can that gets too hot can explode.
6. Test spray before touching the body
Spray a little paint on cardboard or paper first. This lets you check for splatters and makes sure the nozzle is flowing correctly before the paint hits the shell.
If the test spray looks uneven, stop and fix that before you move on.
7. Spray light coats
Do not try to cover the whole body in one heavy pass. Start with a light mist coat and let it dry. Then add another light coat, and keep building coverage that way.
Three or four thin coats usually look better than one or two thick ones. The source material also supports building the first few layers even thinner, with roughly five very light coats before you start thickening things up.
Thin coats help reduce runs, bleeding, and chipping later on.
8. Do not empty the can on the body
When the can is nearly empty, the last few sprays can come out in uneven surges. That can ruin a smooth finish fast.
If you have a little paint left and need touch-ups after the shell is fully dry, spray some into a small container and use a brush carefully. Only do that after the main paint has cured.
9. Let the paint dry
Once the body is painted, leave it undisturbed for at least 24 hours before handling it or doing any more work on it.
If you want to speed up drying, a handheld dryer can help, but keep it on low to medium heat and hold it at least a foot away. Move it around slowly and do not use heat while the paint is still liquid.
For general shell care and handling, body setup and maintenance is worth a look.
Common mistakes to avoid
- Skipping the wash. Dirt and oil keep paint from bonding well.
- Scuffing too hard. Deep scratches can show through the finish.
- Forgetting to shake the can. Poorly mixed paint sprays unevenly.
- Using hot water to warm the can. Heat the can only with warm water, and never overheat it.
- Spraying thick coats. Heavy coats are more likely to run and take longer to dry.
- Touching the body too soon. Let it dry at least 24 hours before handling.
- Painting the last bit of an almost empty can directly on the body. Those final bursts can leave ugly spots.
Troubleshooting
| Problem | Likely cause | What to do |
|---|---|---|
| Paint runs or sags | Coats were too heavy or the can was held too close | Let it dry, then use lighter coats next time |
| Paint will not stick well | Body was not cleaned well or had oil on it | Wash, dry, and handle the body from the inside |
| Rough or splattered finish | Can was not shaken enough or the paint was too cold | Shake longer and warm the can safely before spraying |
| Visible scratches | Surface was scuffed too hard | Use only very fine abrasive and keep pressure light |
| Uneven coverage | Spraying was rushed or the nozzle was inconsistent | Test spray first and build coverage with thin, even passes |
Frequently asked questions
Can I use regular spray paint on an RC car body?
Sometimes, but RC body paint made for Lexan or polycarbonate is usually the better choice. Generic spray paint and automotive paint may work in some cases, but results vary.
Do I need to scuff every RC body before painting?
No. The source material says some people skip it, especially with paint made for Lexan. If you do scuff, keep it very light and avoid areas like windows.
How many coats should I spray?
Thin coats are the way to go. Three or four thin coats usually look better than one or two heavy ones, and the first few layers can be extra light for better control.
How long should I let the paint dry?
At least 24 hours is the safe minimum before you handle the body or keep working on it.
Can I speed up drying with a dryer?
Yes, but only after the paint has started to set a little. Use low to medium heat, keep the dryer at least a foot away, and move it around slowly.
Conclusion
Spray painting RC car bodies is straightforward when you do the prep work and keep the coats light. Clean the shell, handle it carefully, use the right paint, and give each layer time to dry.
If you rush the prep or try to cover everything in one heavy pass, the finish usually shows it. Take your time and the body will look cleaner, smoother, and more durable.