Is it wood sandpaper? It could be the grit coming off and staining the wood.I stripped the Oxblood stain off this pipe using Oxy Clean. I started sanding it with 220 3M sandpaper. These brown spots started appearing. I've never seen this before. Anyone else? Any remedies?
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@BROBS that is a good place to start.
@OP you are hand sanding this correct?
Some musings here, it could be a deeper stain (unlikely) or a deeper penetration of smoke/tars or other things that cause a virgin wood pipe to color. Does it get lighter when you sand just a bit more or is the color consistent?
Quite the mystery.
They usually have it in the auto section at Walmart as well. If you feel like braving the wild. ?all hand sanding. It's not a deeper stain or deeper tars. The pipe wasn't smoked that much. I think brobs is right and a trip to the auto store is in order.