[Tcoat]

Originally Posted by RToyo86

For plastic I would probably even take a Scotch Brite pad or a 3M scuff pad and give smooth surfaces a light pass to give the paint something to stick too. If you don't there's a good chance it'll flake off later. Especially with materials that see heat cycles.

Start with a good clean, scuff, then follow steps Tcoat mentioned. I like using an alcohol based oil remover at the end to Ensure there is zero residue on the surface.

Yep. Successful paint is always in the prep!