I replaced the backstraps on my Uberti 1860 Armys and finished the grips on one so far. My question is that I first used Citrus stip to claen the stock coating and sanded to fit the new backstrap. I used Varathane Dark Walnut stain and then cleared it with Varathane exterior water based satin spar finish as directed applying 4 coats. The color and finish looks great but my question is did I use something totally wrong for a pistol grip,will gun oil dissolve the finish. I am looking for opinions before I finish the second one. My intentions were to seal the wood. Thanks,Southpaw