I'm repairing a Higgins comm 98 stock that was bedded lousy and is all busted up inside. I think I can make the inside solid again, but there are cracks out of the tang edges down into the wrist. They are closed tight but black. I've read here about how to keep them from going farther, but how do I lighten the black so they don't show after finishing? Tried whiting with den alc. It worked a little the first try, then nothing. I've heard steam and also oxylic acid. Haven't tried those yet - I'm still asking anyone that might have fixed this.
Thanks in advance,