Re: Staining dentil molding
You might want to stain the molding before you install it on your mantle, this will give you best access to not only application, but removal of the stain. Work small areas at a time, so that the stain doesn't sit any longer than you need it to. It's going to take time to work the stain into all the nooks and crannies, even more to get it back out afterward, so only do a few teeth at a time, at least until you find a rhythm that works for you.
Remember, end grain takes stain much more quickly and deeply than side grain, so you may want to practice on scrap until you have your method determined.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!