Rusty hand tools. Mini vise, hand vise and clamp.

[WmRMeyers]

WmRMeyers,
The problem with Acids is that they remove sound parent metal as well. If you do not constantly monitor an item it is very easy to destroy it. Work well if used with care and hovered over though. Same with electrolysis as well, it can leave serious pitting and also needs to be set up so that the rusty surfaces are equally exposed to the cathode.
As I have said before I am a big fan of molasses as mixed up at 40:1 - 60:1 with water it is super cheap, effective and only attacks noncorrosive. Slow is its only drawback but the time depends on what the parent metal is and how bad the rust is. Benefit is you can throw stuff in a tank of it and just leave it.
Small delicate items can be de-rusted with strong Black tea, this is something that is used by museum curators.

If it's rusted badly enough, anything, inclulding my fav, EvapoRust, will destroy it. Had a set of feeler gauges for auto tuneups that sat in a box in uncontrolled space for a coupld of decades. The thinner leaves were destroyed. Had to have been rusted through. I've never tried molasses, myself, and had never heard of using black tea, but it's a source of tannic acid, so can't see any reason not to use it. Though I'd have to buy Lipton's to try it. NOT using my Earl Grey for that!

With electrolytic rust removal, if you set up the electrodes correctly, the only pitting will be where the rust left pits, and on your anodes. OTH, if you set them up reversed, it will destroy your object. Found that out the hard way, one day, on a Schwinn tricycle frame when I was just starting with it. You can control the current, and that affects the speed of the process. For machine tools I use a 12VDC battery charger, and from 2-10 amps. For delicate stuff, which I've not done, the milliamp range is supposed to be very good. One of the smaller 12VDC wall-wart power supplys will do that. Just use iron or steel for the anodes, not stainless steel. The anode will be destroyed, eventually. And if you use stainless steel, you will create hexavalent chromium compounds, which is a hazardous toxic waste and bad juju.