...long strips of sandpaper that could be attached to cyclinders for sanding down wing and tail feather surfaces...
One source for sticky-backed rolls of sandpaper is McMaster-Carr. Go online to http://www.mcmaster.com/. Go to the bottom of page 2514 of the on-line catalog. I've used this paper. It may not be perfect, but it works for me. Kerwyn Stoll Mattoon, IL