I know this has probably been addressed but has any of you found a technique that works for painting plastic? I've tried Fussion - junk, automotive paint - limited success, Krylon engine paint - limited success. Surely there is a paint out there that will bond to plastic.

And Oh, BTW my name is flyingw and this is my first post. I'm a ATC triker by birth.

You have to use a special primer that bonds with the plastic, then you use a flex agent in the paint to prevent flaking.
There is a guy in the sand sports mags that sells a video on custom painting plastic.

I did this

Adhesion Promoter

Bulldog Adhesion Promoter is designed to promote paint adhesion to all automotive surfaces, even problem plastics. It works equally well on all flexible or rigid plastics, fiberglass, aluminum, glass, chrome, vinyl, galvanized metal, and painted surfaces. Bulldog acts as a tie coat by allowing several different surfaces to be painted at the same time to assure a smooth, flawless, durable finish every time. If added to the paint, it will perform as a flex agent, promoting more flexibility on plastics.


Plastic Bumper Refinishing
Step 1:

Prepare work area and secure bumper to appropriate fixture. Clean bumper thoroughly using Klean-Strip Prep-All Wax and Grease Remover.

Step 2:

Wipe off Wax and Grease Remover with cloth, until dry. Apply Bulldog Abrasive Cleaner.

Step 3:

Use a pad to abrade the area.

Step 4:

Rinse thoroughly with plenty of water. (Important: Do not wipe surface with any type of solvent after rinsing.)

Step 5:

Wipe dry using a clean cloth and air hose. Once the plastic is ready for Bulldog Adhesion Promoter,To make sure the plastic is ready for Bulldog, mist a small area with water. If sheeting occurs , dry the surface and apply Bulldog. If the water beads, repeat steps one through five.
proceed with Bulldog application.

Step 6:

Move bumper to paint booth and clean using a tack cloth and air hose.

Step 7:

Once surface has been prepared, add Bulldog Adhesion Promoter to spray gun. Use 100% Bulldog for clear spray out or mix 90% Bulldog with 10% basecoat for visible color coverage.

Step 8:

Apply two to three light coats of Bulldog Adhesion Promoter, allowing it to flash 3 to 5 minutes between coats.

Step 8:

Apply basecoat wet on wet per manufacturer's instructions. Use Bulldog as a flex agent by adding a ratio of 1:4 Bulldog Adhesion Promoter with basecoat.

Step 10:

Apply clear coat per manufacturer's instructions. Use Bulldog as a flex agent by adding a ratio of 1:3 Bulldog Adhesion Promoter with clear coat.

came out sharp