The Delta Kits headlight restoration system includes a 3” random orbit sander, and although durable, the brushes in them will wear out over time.
All electric sanders have little mechanisms in them called brushes. Without brushes the sanding tool will not run. The brushes rest against the commentator as it spins and over time will wear down. If you notice that the speed of the tool is inconsistent, that may be a good indication that the brushes need to be replaced. In extreme cases the tool may cease working until they are replaced.
For your convenience, all Delta Kits headlight restoration systems that include a sanding tool also include an extra set of replacement brushes. We have created a short tutorial video on how to change these brushes.