Perago Rotating Blaster Disk - Multi
Perago blaster uses hard metal studs to hit the surface very much like the grains of a sandblaster, and produces much the same result. It excels at rust removal because a blasting method like Perago opens the rust-pores. Grinding and brushing do not, merely covering them by fresh metal and dust. Grinding and brushing will heat up the surface, resulting in quick oxidation.