Ken, I stain and use Q tips or a small brush with stain to make the inlets darker, if anything, than the rest of the stock. When I apply the finish, I make sure all the mortices and under the butt plate gets well sealed. When I first started this craft, I made my inlets WAY too tight, so that when it came time to assemble the finished rifle, I had to scrape inlet walls to get parts to go in. I still have to do so from time to time, but I'm much more generous with my inlets now. There are still no gaps (ha ha) but locks or triggers come in and out easily now. I stain and finish the barrel channel too.