if you want to pain the grille/mesh area, you will need to disassemble the phones, not difficult, just grab a pair of small philips head screwdrivers from your workbench and unscrew four little screws.
once you have the grille removed, you can have all the fun you want with the painting process
although spray painting a perfect coat isn't an easy task (unlike doing graffiti) go outside, on a warm-ish, dry day with very little wind, dust on one thin coat (should be a mist..don't try and cover in one coat) wait an hour, any dust particles, sand with 2000 grit sandpaper. spray another two coats with an hour of drying time in between, then wait 24 hours or so and spray on what we call a "wet coat". Wait a couple days until the paint cures and if it's mettalic and you want to buff it up with a polishing kit, you will need another spray of a clear coat. then you can go from there with either a polishing kit and some automotive buffing compounds or just use the compound if a mirror finish isn't all that important.
also, if you want the ultimate finish in terms of durability and shine, automotive two part urethane is your best bet but it does require slightly more specialized equipment and can cause very adverse reactions without proper precautions taken
for the average modder/painter who wants to practice, just go to wallmart and buy 5-6 cans of their $.97 special spray cans. (apparently benjamin sheridan relabels their paint for walmart)
some disposable/clear plastic ladles and practice your techniques
Edited by buffalowings - 10/25/11 at 8:21pm