Just a quick few photos. Have tipped a jar of CorrosionX Rust Remover into a jar and added about 75% again of just water.  Then had a plan.

Here is a before of a drill bit sitting on my shelf.

Put it in the jar with some other experiments

And after...to be fair I may have wiped the drill bit with CorrosionX before I photo'd. I wanted to keep it good after the treatment.