I found a Used GPR .54 flint that somebody made from a kit, at what seems like a reasonable price $150.00. The stock is alright looking but needs to be refinished. My question is how hard is it to remove the old finish. It has a real shiny finish, almost like laquer. The gun seems in really good shape overall, like it was hardly fired. Barrel looks like new. what do you think? Is this to much money for this gun. also what would I use to remove the old finish? thanks for your help.