I have a dull Prop Reamer.....
#2
Likely the 45 degree chamfer on the leading edges can be sharpened with a stone, or small dremel wheel. I have a Fox one that never really was sharp in the first place. (and a Harbor Freight one that had the flutes cut at the wrong part of the oval. On the three pack, two were bad, the same deal when returned. It was like step drills with no steps.)