Anybody ever been able remove a massive "bar tan"? It's REAALY dark. It's "everywhere" on the guitar except under guard, bridge, etc (old Tele) and I'm thinking of trying MAYBE 409 with a quick elbowgrease rub, wiped down following with water, then fast towel dry. (I actually got rid of 95% of a feltpen autograph this way on another old Tele). This one being a much "larger" project I thought I'd ask around. I would do a "safe" area first to see what happens. ANY thoughts appreciated.