"85% humidity and drying in the sun" No blapark figure for that situation, and the stock may not fit the gun afterwards anyhoo. Get it out of the sun and humidity, and steel wool it down until you are getting dry sawdust. As Bear Flare said, it may Never dry, and may have already warped or swollen. I have a hall closet which, for some unknown reason, has an air vent in it. The humidty with the AC on is somewhere in the low teens. The finishing I do is kept there until each coat dries, and the drying time will vary depending on which concoction I've applied._Usually_, no more than three days. Again, heavy coats don't accomplish anything. The light "finger dabs" spread continuously over the whole surface, and wooled down, will result in a tough, onion skin layer that protects, lets in light to show off the grain, and is easily touched up when scratched or dented.Even turp and boiled will react to this technique, and it is the least "showy" of any oil finish mix.