plastic is insanley hard to get painted well, especially objects that arent flat,
you must use primer, its just a given, rustoleum makes a line called PROFESSIONAL and its in a tall can, get a gray or redish primer.
any color company will do, duplicolor is good also, just do not get the paint that says chrome on it, it will not clearcoat and it leaves fingerprints on it all the time, it just flakes off.
i use mettalic, then i clear coat(super smooth laquer)its in a green bottle with some picture of like soliders on it, yea it sounds strange
either metal specks
or rustoleum mettalic
you can see my work in the case thread at the top of this section, just posted my 360 a coupel days ago