- Joined
- Aug 19, 2013
- Messages
- 764
Evaporust. Read and follow the instructions. It is safe and works well, but costs more. Acid based de-rusting schemes involve losing some of the original metal along with the rust. If it is a shovel, no big deal. If it is a gage pin, it matters! If it is a Hermann Schmidt grinding vise, it will come out frosted instead of shiny and will be less than perfectly accurate in the tenths world. Of course, the rust removed is also the original metal, so that can matter as well. The gage pins in your photo still have ends that will be completely usable and accurate (the less rusty ends) after Evaporust, but not after vinegar, naval jelly, CRL, and other acid products. Electrolysis done properly is also OK, but it can also cause good metal removal under certain conditions. Molasses, I honestly do not know...
This the best and most succinct description of rust removal I have seen, particularly pertaining to maintaining dimensional accuracy. +1 on Evaporust.