Step 4: Paint
I stuck my triggers, start and back buttons on nails in styrofoam. Also I stuck the D-pad, bumper top piece and gray bottom piece into some, just so i could get good paint coverage.
For this step I put painter's tape in the holes on the front(for the d-pad, sticks, start, back and abxy holes) so that when i did my second coat it wouldn't glob up inside the controller. (which is was completely useless because I didn't paint anything while it was together, so you can pretty much ignore this silly step.)
To start you want to put your base coat on (preferably the lighter color). Be careful to do several light coats. Wait about 20 minutes between coats. The first coat may not seem like enough but after 3 or 4 coats, it will be looking good.
After this step, I let my own dry overnight.