I'm not precious about my guitars as I've got solder marks and stuff all overthe back of my les paul, screw holes widened in my strats etc. The stupidest one just lately was when I got my new 'Lil Bitch' cabronita back from John @ JXG guitars. I asked him to not put in the pickup as I'd do it (not a problem usually), so the pickup arrives I tried to insert it into the cavity & of course the the solder for the cover makes the pickup slightly to big...so I pushed it in & took 2 big chips out of the paintwork around the cavity...oh well