Hi I've just picked up a early 80s air rifle which I was going to have restored but having sorted out the correct screws for the gun and with the gun shooting as consistent as it is I've managed also to clean the action and barrel up with a bit of wire wool soaked in some oil, ive decided that the best for this gun is to leave as is , Its really not that bad, The stock however needs a good clean and there does not seem to be much of the original Finnish left on the stock, Just wanted to ask what would be the best method of cleaning the stock of this gun, Thanks