My dad is refinishing our hardwood for us, it thin (about 1.5" wide and only 3/8" thick) maple. In one of the bedrooms, the previous owner didn't like the squeaks in the floor and screwed about 30 #8 screws into the floor. We removed the screws since they looked like crap and the funny thing is, the floor doesn't squeak any more than it did with the screws in it. Anyhow, squeaks I am not concerned about. What I am concerned about is, the large screw holes left in my floor. My dad has completely sanded the floors down and put on 3 coats of water-based Verethane, they look fantastic so far, other than the screw holes. He can't sand the floors down any further due to the thinness of the wood. He does not want to fill the screw holes as he says that most likely due to their funnel shape (narrow at the bottom, wide at the top), that the filler may pop out over time lifting the finish with it. After searching around on Google, this does seem like a possibility.
He said he will fill them for me before the fourth coat of Verethane if I want, but if it's going to pop out like he says in a few years, I'd rather leave them. They do not look very attractive though.
Thus, my questions are, should I suck it up and just leave all the screw holes, or get my dad to fill them? If he fills them, should he use the maple filler from a local hardwood supplier (they say it is one of the only fillers that actually looks good), or should he mix the sawdust with the Verethane? I also saw suggestions of using dowels to plug holes, but I suspect these could also pop out?
Thanks for any suggestions!