did the S-W remove stain or just the finish material? or was there even any stain? wouldn't be any on most walnuts, eh? ok, maybe a dumb question...LOLI refinished an old walnut Fajen on a Chilean Mauser rebarreled to 308. I used Sherwin Williams peel away 7 to dissolve the old finish. I sanded through 600 and the did a satin tung oil finish.
I’ve done many Sako stocks with the Varnish finish. I scrape that off, it removes very easily.
Then I sand and finish, the varnish on those has the stain/colour in it, Sako always used a reddish hue in their varnishes in the L series stocks.
The newer stocks are an oil finish.
Personally, I don’t like varnish, it doesn’t feel right to me.
I used Citristrip a few times, it works on Polyurethane quite well.