Reply by BertFlores58

A stronger one that I use is the Epoxy reducer… any brand will do. It is a liquid like paint thinner. Just soak the wood and later wipe off. You have to be quick wiping it while wet because it is highly volatile. Not bad for the wood.

If there are still lots of discolorization.. use bleach… A and B. Up to your application. It will turn white evenly but restoring the grain pattern after a new stain is applied.

Hope this will help. But be careful with chemicals.

-- Bert