I'm sure everyone's done one or at least seen one... the main point to this is showing the before and after.
My first attempt was with using spray paint. The paint went on fine but in person it looked too dark and bugged me ever after.
Attachment 1372
So I re-painted him by hand
Attachment 1373
Now his joints are all gummed up and I doubt I will ever transform him into jet-mode. At least he looks nice on the shelf.