I bought a bottle of Hoppe's Elite Black Powder Solvent the other day to try and found that if it runs down the side of the gun it'll immediately mar the original finish on the butt stock of a very nice second model '73 Winchester (this produces the side affect of a seriously sick stomach). No warning whatsoever on the product that it might attack wood finishes. I've never had any similar problem with No. 9 or any other solvent. Anybody had any experience with this crap?