Well you COULD tell us what you have. Some finishes, like say the older Remington glass hard finish, needs something quite strong to cut it. Some finishes used shellac and rubbing alcohol removes them. So choices would be alcohol(for shellac finishes), strong paint remover(for newer super hard finishes), lacquer thinner(for lacquer finishes), hammer and chisel(for very hard to remove finishes), maybe other solvents for different finishes.
Just walking on the edge of of my grave.