How to Make a Custom Sanding Block
- 1). Lay an 8- to 12-inch-wide sheet of plastic wrap over the face of a piece of scrap molding.
- 2). Mix a two-part filler (Bondo works great) and press it onto the plastic to fit the molding's shape.
- 3). Wrap the edges of the plastic up around the filler and let it set.
- 4). Remove the filler block when dry.
- 5). Cut a sheet of sandpaper the same width and a few inches longer than the block.
- 6). Wrap the ends of the sandpaper around the ends of the block and you now have a custom molding sanding block.
