A sandblaster can be a great way to take care of that old crud. As mentioned, you can use a power grinder. However, power grinders are ideal for large, moderately-flat surfaces.

Coffee grinder had years of history etched into its surface. ... Rust was removed with a powerful 2000-watt laser, and the smaller parts were cleaned using a sandblaster.

The sandblaster build, centered as it is around scrap propane tanks, has some lethal potential, but luckily the team displaced any remaining gas from the tanks with water before doing any cutting.

It'll take four empty LPG canisters, a welder, laser cutter, and plenty of fixtures to build your own sandblaster. By Timothy Dahl Published: Apr 29, 2016 9:08 AM EDT.

A sandblaster can be a great way to take care of that old crud. As mentioned, you can use a power grinder. However, power grinders are ideal for large, moderately-flat surfaces.