I'll attempt to answer all the replies in one post (the admins can thank me later

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I'm confident that applying more oil would take away the discoloration.
The discoloration wasn't as noticable until AFTER I cleaned the board.
I'm not sure if it is just surface polyurethane wear or not, but when I started cleaning it (or whenver I do use cleaning stuff), the discoloration goes away, but when it dries, the discoloration returns.
Yes, the round wound strings seemed to do a number on the fretboard. I don't play it a whole lot, and didn't know that it was that "extensive". It still plays well and sounds fine. However, I HAVE noticed that, on the E and A strings, around the 9th fret area (becoming noticeable after the 6th or so), the string tone seems to have a bit less...presence. It doesn't seem to have the same "mwah" characteristics up there, and I think it's a recent thing.
