painting the chassis can be as difficult as you want it to be. if you absolutely have to have it *perfect*, then its going to be a pain in the ass (theres a lot of sides and details to a chassis!). on the other hand, if you dont mind letting some stuff slide, especially where you wouldnt normally be able to see it, then it wont be as hard.
painting a chassis consists of 2 basic steps: priming and painting. make sure the chassis is clean, and then give it a few coats (not too thick) of primer. you shouldnt be able to see the metal chassis. sand in between coats if necessary (400 or 600 grit is fine). you dont have to sand, but that depends on how anal you are
once the primer is dry, you can begin laying down your color (black in your case, pardon the pun). flat black might be a little more forgiving than gloss black but its your call. make sure to get quality paint, such as dupli-color or krylon (or whatever other preferance you have). again, sand in between coats if necessary. be sure to give plenty of time drying; give more time if its especially humid outside (follow the directions on the can. generally its ok to sand in about a day, and ready to recoat in a few hours). take your time and it should come out at least half-decent lol. its better to apply paint in several thin coats then 1 thick coat (too thick and it could run or 'orange peel' on you). dont forget to paint the back of your PSU as well, since it would look kinda silly to have a black chassis and a gray PSU (unless your PSU is already black). paint it the same as you'ld paint the chassis.
GL, HF
