SFXTekken Pro stick modyfing

Hi just bought this got a few questiones noticed a couple of sticks on here with cusrom colours on the surrounds of there sticks how is this achieved simply by painting?

Also trying to make my own artwork will submit some when Im haply wirh my amatur effort - read a bit about GIMP on here is that any good ? Been using the free eqiviluent of Adobe at the moment.

Also lastly any UK places which sell the plexi glass for my stick its a PS3 one


Thanks mate will post in there