ok.... the reply is close to accurate!
here is what you need to do.....
1) get some 400 grit sandpaper
2) buy desired paint
3) buy a chemical called MEK

1) sand the area to pe painted
2) wipe w/ MEK "really good"!!!! you can get this at automotive paint supply or fiberglass shops.
3) spray 3 "LIGHT" coats of paint or untill desired coverage.

alot of people have the misconsception of "IHAVE TO BUY INTERRIOR PAINT" because the paint won't adhear to the interrior panels. the reason the paint wont stick is because of the "Armor all" type products that contain oils in them,that people use.
if you do a good enough prep job w/ the right materials, you can make any paint job look good and last.
mike