I think the first thing thst should be considered is the stock blank, itself. Not all blanks are equal. Some species of stock wood are more tight grained than others. Tighter grain won't react to moisture like a wood with more open grain will. I gave up on True Oil years ago. I like to start sealing with Pemalyn sealer. After I've wet sanded enough to fill the pores I like Pro Custom Oil. Hands down superior to True Oil. I know of one stock maker that sealed using Acra-Glass liquid. Mixed it up, wiped it on with a plastic card, let it dry for 48+ hours, and sanded with 320, then buffed with 400. It made for a nice finish and certainly sealed the blank from moisture. Kinda' messy, though.