one of my two ax400's could look nicer, the other is pretty ****ing minty //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif i'm glad misfit talked me out of selling it.
I'd suggest automotive grade touch up paint, man. Make sure to clean the hell out of the amp prior to painting. A little bit of sanding (where you'll be painting) may not be a bad idea either. If the area is really small, you could possibly glue a piece of sandpaper to the eraser of a pencil...
I just hate to see people selling irreplaceable stuff that I know they'll regret losing...