Those Black Stains On Your Stripped Stock
Most everyone whose stripped a Mil Surp stock has seen them.... The Black stains that never seem to go away no matter what you try. I've seen/had my share.
If your interested look over this older link I pulled from the CMP Forum.
Also look over this link to Bar Keepers Friend, it contains Oxalic Acid which is found in the wood bleaches.
Black stains on M1 Carbine stocks - CMP Forums
Removing Stains from Teak and Walnut Furniture
Before:
https://www.milsurps.com/images/impo...tains001-1.jpg
After Multiple Treatments:https://www.milsurps.com/images/impo...tains004-1.jpg