They may be able to help you over at Project Guitar. I know one of the mods is from Texas.
Sounds like it can be done but obvioulsy I haven't seen it. Maybe the fretboard wont need to be taken off and can be sanded down with the frets out while it's still attached. Of course, if this was me the problem would be how to remove the guitar from your mates arse first.
Whats up with the paint job, surface scratches or something worse?