I recently got this super cool 77-78 bass from the original owner. Apparently, the bass was left in storage and the finish got stuck to the lining of the original case. There are a series of rough patches around the bass particularly on the back side. Im wonder what, if anything, I should do with the finish? I was half thinking for trying some really, really light sanding on the rough patches, just to smooth the finish out a bit. Im sure someone here will have a much more informed opinion. Also, Im wondering about the darker colored 5th fret, anyone seen this before? I'm having trouble posting pic, I'll keep trying.