Building Your Own Sanding Blocks

High-Density Foam sanding blocks are great for block sanding filler and primer. But they can get expensive, and the cost alone can have you second-guessing yourself when it comes to modifying one of these foam gems. Mark Simpson shares a great tip that will help you build custom foam sanding blocks at a fraction of the cost. Using easy to find online foam yoga blocks, Simpson modifies these using simple hand tools to create one-of-a-kind custom sanding blocks for almost any need.