I made this quick-release sanding block from four pieces of 1/2″-thick birch plywood. The top three pieces are glued together. Wrap a quarter sheet of sandpaper around the bottom piece and slip on the top assembly. The toggle clamp locks …
…
The shape, the texture, and even the hard side all come in handy for different tasks.
Read moreTo sand a lot of molding, glue 80-grit sandpaper to several inches of the molding. Rub a block of Styrofoam on the sandpaper until the block conforms to the molding’s contour. Glue sandpaper to the block, then sand the molding.…
Source
You might learn a thing or two in this video by William NG.
Read moreIn my work as a luthier, I sand a lot of curved surfaces. I’ve found that I can make perfect sandpaper backing pads from “kneeling cushions” sold for garden work. Available at home-supply stores or on Amazon for a few …
Source