
When we glued the foam sections onto the spar, the resin leaked out and ran down each seam on the back of the prop. This gave us a hard 'line' at each seam that didn't want to sand easily.
After a few different attempts, we finally found that a small sanding drum on a dremel tool could be used to lower the level of each seam below the desired surface. We'll then fill these seams and sand them level.
