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If you've genuinely never done something like this before, I highly suggest you practice your techniques on similar materials using similar products before you try on the final piece. Even Duplicolor products will look great with a good technique, and it's inexpensive and widely available.The paint kit has 3 cans. A primer (adhesion promoter?), Velocity Blue, and a Clear Coat (hurricane protection?). I’ll practice a bit on the underside, and if I screw up the topside I can always bring it to a pro to “repair”. Or I can make it into a outdoor patio table![]()
Most automotive exterior body parts are made of polypropylene, which has very low surface energy compared to other types of plastics, which makes paint adhesion tricky. Storage totes (like the black ones with yellow lids) and 5-gallon buckets are usually polypropylene and make good analogues.
The basic technique I'd suggest is:
- Clean items with dish soap and water (optional)
- Clean items with plastic prep cleaner, such as Duplicolor Prep Spray.
- Scuff items with a light gray Scotch Brite pad until it has an even matte finish (this is where using a bucket might be better to practice than a tote)
- Clean again with plastic prep
- Apply adhesion promoter, such as Duplicolor adhesion promoter for plastic. This step is critical for polypropylene due to its low surface energy. Even the best primer and paint will just peel and flake off otherwise.
- Apply primer. Sand if you want, but definitely wipe it down with plastic prep afterward.
- Apply base color.
- Apply clear coat. Do it within 30 minutes of the last coat of base. Do a fairly thin coat first, then lay down subsequent coats thick enough to the point that it almost runs. It should immediately look glossy and not like dry fog.
- If you don't lay the clear down thick enough, you'll have a piece that will look somewhere between chalkboard flat and eggshell matte, and it will never polish to a gloss because there isn't enough clear to polish.
- If you get sidetracked and more than 30 minutes has gone since you applied the last layer of base, wait 24 hours, scuff the base coat with a light gray Scotch Brite, wipe with plastic prep, paint another coat of base, wait for it to flash, and then begin applying the clear.
- Let the clear coat cure for 24 hours before polishing (if it needs any) to a shine. Let it cure for at least a week (preferably a month or so) before waxing it.
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