To speed up sanding the inside curves of crown moldings, I made a profile sander out of a PVC tee fitting and foam pipe insulation. The foam, which is glued to the tee with spray adhesive, overhangs the ends of the fitting to stop gouging. Stick self-adhesive sandpaper to the foam and go to town. I mounted mine on an oscillating sander.
— Mark Collins, Centennial, Colo.