Looking for some help gentlemen. My son has one of these that he is trying to get put back together. It came from classic I believe and was a parts gun. He has almost all the parts collected but a firing pin and spring and a rear action screw. Our main question is he cleaned all the cosmoline off the rifle and stock. What should he put back on the stock to protect it? The last 6" of barrel is pretty pitted but we are going to keep cleaning it and purchase some reloading supplies and get the old girl shooting again. Also does anyone have a good mild load for the oy to punch paper with?

Thank you for any help