White Stuff in Pores of African Mahogany
I am working with African mahogany for the first time. I have a straight-grained quartersawn board which I am prepping with jointer and thickness planer. I note that on the portion of the board nearer to one edge the linear pores in the grain are consistently dark, as is typical, while on the same face of the board, but nearer the opposite edge, many of the pores are filled with a white material. What is this stuff and how to eliminate it?