I have had several suggestions as to how to refinish a stock that I have. I will be using boiled linseed oil. The stock I have is off of an old BRNO ZKK 601 in .223 Rem. I'm not the original owner and it's really hard to tell due to the age of the stock if it has been refinished or not. The barrel channel has been really free floated (you could sail a ship down it), and the forward swivel stud has been moved closer to the receiver. Any tricks to find out if it's an oil finish before I use Polystripper on a small area? I have attached a couple of pictures of the stock. I refinished a stock about 30yrs ago on my BRNO ZKK 602 in 375H&H. It turned out pretty good. Problem is the "elevator" doesn't go to that floor anymore so I don't exactly remember what I did.