Use the Lasso Tool (assuming you use Photoshop) and go round the areas you want to paint in a different colours.
FXO fender colouring?
(3 posts, started )
Pass then. Never used Gimp so I can't help, sorry. 
An easter gift... :bunny3:
FXO fender colouring?
(3 posts, started )
FGED GREDG RDFGDR GSFDG