Ok ya want flames on ya sides?
#1. sand it carefully down to the metal.
#2. use some kind of primer on the case shell.
#3. use a fine grit sandpaper to smooth the primer.
DO NOT SAND THROUGH THE PRIMER!
#4. Spray on your base color...for this we are going to say black.
note:you problably want to use a flat color not a gloss.
#5. Now make your self a stencil out of poster board.
#6. Tape your stencil to you case shell, then cover the rest in newspaper so as not to get any paint on the already painted parts.
#7. Spray the flames on.
tada you have a black case with red flames.