This is my first post here. I was directed to this forum by Joe Gorleski at veneersupplies.com who said that mahogany may have a fleece backing. I am working on an older Slingerland Snare Drum, most likely built in the 1950s. I was carefully sanding the outer mahogany ply of the 3 ply drum (Mahogany, then 2 plies of maple). Afterward I wiped it down with mineral spirits and noticed some white lines in the direction of the grain. It dawned on me that I may have sanded down too far although I was quite careful no to. I plan to use Waterlox Original Satin as the finish. Is there anyway I can darken the white lines? Any other suggestions? I have attached two pictures to show what I am dealing with.