SEM
Mel is correct. The consensus at Cessna Pilot's Assn (CPA) and from my personal experience is that SEM is the best brand of these to use on plastic. The following is from several posts on the CPA site that I kept because I did not want to forget the brand name of the paint. It is GOOD paint for plastic. I painted a Royalite (Cessna plastic) panel with it and it was still looking like new when I sold my share of the plane 4 years later. I went from an original black panel to a beige color and you could never tell that it was a paint job. No chipping, scratching or other ugly stuff that some paint does.
Go to an Auto Body Supply Shop and ask for SEM brand products. Follow the directions to the letter. For best results, do not get creative. Wear a good quality paint respirator. This stuff if bad for you. ..... JBC
I second this post. The SEM brand paint is not cheap but it's good. I'm not a great painter but somehow this stuff dries with no runs, no drips. And yes it does "mist", wear at least a mask. We did a token cleaning with ethanol prior to painting, and after using fiberglass and PVC pipe cement to repair the cracks.
I used SEM paint and it worked great. However, before I sprayed paint, I used the SEM Plastic Prep to clean the surfaces. That may help get good results.
Arne P206
Another vote for the SEM products. I painted my entire interior over 10 years ago and it still looks good. Doesn't scratch or rub off. Best part is, it looks like the factory finish, not like its been painted. Be sure to use the prep solvent "Sand Free". Spray the color while the plastic is still wet with the solvent. It works best on hard plastic or "royalite". On vinyl it comes out a little glossy. But you can top coat it with low gloss clear (also a SEM product).