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This is East Indian Rosewood. Does anyone know what this powdery white stuff could be that was stuck in some of the pores? It was a big pain to scrape it out with a razor knife, but it came out OK.

Yep ..agreed some kind of mineral .. I see it in EIrw and brw every now and then too ... a lot of times the zpoxy will darken it up and it disappears. Its mother nature ....

_________________
Tony Karol
www.karol-guitars.com
"let my passion .. fulfill yours"

I had a teak board resawn for a furniture project. After the board sat for a while, white deposits came to the fresh surface and some even bubbled out. These were removed with a rag and water. I expect, in this instance, the white material was some kind of sap. The point is, there could be more than one source, so try different things, including possibly a wet rag.