Del,
I have a couple of cans of Spaz-Stix and have tried it on both a plastic part and a resin bumper with great results. I prime the part, I use a base coat of Krylon black, and then the Spaz-Stix and it looks great. No clear! It is made to spray into clear lexan R/C bodies and then with black over it, but it works on plastic just like I have described. I hope that this helps.