I am working on two Bansner stocks right now that I want to hunt with this year.
I just scrape, file, and sand off the flashing from the mold, to get off the high spots.
Then fill in the pits or low spots with 2 part epoxy putty: Putty-Cote.
Those two steps are what separates it from a McMillan Edge basic inlet stock, but only half the price.