I have an apple pro keyboard that I want to spray paint. Its clear plastic so what do I have to do to prep the surface and should i get a plastic primer or get plastic paint.
Krylon's Fusion line of spray paints is made for plastics.
Another option could be the paints used on plastic models. You can find those at any hobby store.
The keyboard is probably Acrylic like basketball backboards and PlexiGlass sheeting and standard plastic eyeglass lenses (the ones covered under the company's optical plan, not the higher priced ones).
You might want to paint the inside. That way, the paint is protected and you still get the color. You'll still see any seams and mold marks, if there are any, since the paint will be under them. If you don't like the look, you can paint the outside.