I've refinished a few stocks by various methods, I've used rattle can spray lacquer a few times, I've also used BLO and Tung based oil, Not done much recently due to arthritic hands
The bottom one of these (Webley mk3) was a stock I bought for £20, It was black with muck and age, Couldn't believe the grain that came out when I started rubbing it down!! I used Boiled Linseed Oil as it's walnut rather than beech..
Did these two Airwolf stocks for a gent, In return he gave me a BSA Superstar mk1 with a 4-12x56 Superscope and an immaculate boxed BSA Scorpion pistol!!
This HW95 I redfinished with the rattle cans!! I mixed the stain up from various bits that were left in cans, It's an 'orrible colour but looks better than it was before!!
This was a tired old BSA Cadet Major stock that had been damaged in front of the trigger guard, It hadn't been shaped correctly and wasn't made to fit right, He asked me to have a go at it, I used the spray lacquer to finish it..
The repair really needed taking out and a new piece cutting to fit better but he said to not bother..
And finished, He was happy enough with it..