This is a nice picture, but imo the light on the guitar is to harsh, Maybe you used a flash and it got the light on the guitar. But you can always work it out on photoshop. but nice ideia.
The existing artwork in the background is great, the foreground guitar with nasty reflections is not so great. Try lighting the guitar so that all the shadow detail can be made out, without burning out any of the highlights. And make sure that the light source is not reflected in the paintwork. 4
A decent picture, but I would've wiped the guitar down so there weren't fingerprints all over it (the flash really makes them visible). Most of this seems to be a picture of a picture, too...