I generally use well worn, clean cotton t shirts or underwear which are past their feasible wear date. This leaves them lint free. I cut a small patch, maybe about 4 inches square and apply whatever finish I am using with them although these days I almost exclusively use Chamber finish. Doesn't seem to ever streak or leave any residue. Unless I am applying an initial fill coat, which I want to soak down in the wood, I apply as little finish at a time as possible and rub it in. I have never needed to go back and smooth out a finish. With Chambers finish, you can control the amount of gloss by how many coats you apply. I always let dry at least 24 hours between coats, if the finish is not 100% cured, if you apply more finish over it, you just moisten up the previous coat and extend the cure time even more.