I was told Ruger used Lin-Speed
Lin-Speed
https://www.brownells.com/gunsmith-...wood-finishes/gunstock-oil-prod8004.aspxThere is a "how to" out there on stock refinishing that specifically deals with Lin-Speed. Cutting the first couple coats with mineral spirits, sanding between coats (more like gentle rubbing down between coats) ect ect....
I did a No. 1 RSI years ago.. Something like 10 coats before she stopped penetrating and getting dull spots.
On the rack, you couldn't tell the finish difference between the the one I did and the others.