Originally Posted by Caca de Kick
the paint will flake off. Plastic and even moreso textured plastic is a very difficult material to paint, especially with anything from a spray can.
If the covers are ABS, PVC or something like them, Fusion will work fine- it has some really strong solvents that soften the plastic, making it adhere better but they still need to be grease/oil/dirt free. Some plastics won't accept paint, no matter what kind, though.