@McVenco
Just make sure you first cut holes into the A500 for future upgrades.............like a slimline CDROM port or Jumper switchers and USB ports. (Incase you decide to add these later, you wont have to repaint the holes.)
Also I Highly suggest flat black, then coat it with Matte finish clear paint. YOu cant go wrong with the correct black and most likely the Keystickers will be black or white. REMEMBER to label each key at the bottom so that when you paint it you know where those keys belong............becuase you do have to remove each one to paint them. You can spread them all out on a piece of cardboard and paint them lightly at seperate intervals so that they dont get stuck to the cardboard. Move them a little bit after the first coat, and then spray them again evenly.