I have tried white vinegar, CLR, and muriatic acid. Nothing seems to change the spots. I put a drop of dye on a spot on a piece of scrap and all it did was color around the spot.
When the back is sanded and sets overnight the spots don't show much. As soon as I wet it with naptha, the spots jump out everywhere.
Any other suggestions, other than not to build with this piece? Its a little late for that suggestion
Travis
Here is a picture of the back and a closeup of the spots.
