Dremel has sanding drums that are 3/8" dia. and 5/8" dia.

I think if you scuff sand down to the wood you will be OK. The book calls for 3 coats of epoxy varnish on the wood. That's a lot of varnishing and is a real pain, especially on the wings. I needed to wear a respirator while varnishing to avoid feeling ill, but I did the 3 coats.

Jim