This is my first post so bear with me, after 30 yrs. I had to refinish my Win Model 88 it had a boiled linseed oil finish which was still shiny but worn in wear areas. Remove action from stock, sand with non-loading sand paper sanding with the grain starting with 120 grit, then 150, then 220 till scratches & all old finish are gone. Go to your local auto paint finish supplier and get
1 sheet each of 220, 320, 400, 600 & 800 grit wet/dry Tri-Mite paper.
Get a qt. of good quality gloss spar varnish e.g. McCloskeys and some cheap chip brushes. Thin first coat 3 parts spar to 1 part turps and apply liberally
with brush then using nitrile gloves sand in with 1/8 sht. 220 wet/dry using circular motion, this creates a slurry which will fill the pores, wipe down with lint free cloth and let dry overnight. Next day use spar straight and sand with
220 again and wipe down each day using finer grit. This finish is low luster, silky smooth and tough. You can stop at 600 grit if you are satisfied I have gone as far as 1200 on table tops. Be sure to put used rags into covered metal container and put outside as they can spontaneously combust.