what kind of paint for buttons?..

im blacking out my 500 pads are ordered but id like to paint all the LIGHT grey buttons black and knobs..whats the best paint to use to do this??
im kinda scared that imma mess it up...but i think i can handle just the buttons n knobs (i hope) hah

Well, it's not a god idea to paint the buttons. In time it will ware off.
http://www.mpcstuff.com/mpc-1000-black-jog-data-w.html
http://www.mpcstuff.com/black-buttons-for-most-mpcs.html
http://www.mpcstuff.com/cursor-button-in-black1.html

These will fit the mpc-500 nicely.