Ok well. im cheap and also enjoy the pleasure from crafting things of my own so ive been looking into making my own brush. in my opinion a 20$ 26mm brush that i make myself beats any 150$ one any day. but ive got a few questions. What kind of glue/epoxy would i use to secure the knot to the handle after ive lathed it? also what would you use to seal the wood so as to not incur water damage? any helpful advice would be greatly appreciated.