Using your fingers is good because there is no chance of lint finding its way into he finish, lint free rags I heard were ok. Using 0000 steel wool to buff between coats is the way to go just like was said. I always blow it off after buffing to keep the tiny pieces of steel wool out too.
Never used on a bow yet only guitar necks, same idea. I don't know if anyone else have had bits of steel wool get into he mix, I've noticed it once checking it in he sun, now I do as mentioned and haven't had a problem. It's a very easy application as you probably found out, good stuff
Sorry guys just noticed someone already covered the lint thing, my bad