Hi Iridium. I am a machinist newbie
. Is Zinc Stearate something you get in cutting oils? I bought this oil I think based on recommended from our Canadian friend:
https://www.amazon.com/dp/B000F09CF4/ref=pe_385040_30332190_TE_3p_dp_1
I believe some deep drilling, e.g. oil wells, use zinc stearic combinations.
I would use zinc stearate or Slugger in non-drill press situations.
Kano Kronos is supposed to be a good penetrating oil.
Recipe for the best penetrating oil, but must be used with a priceless commodity: patience.
10 parts Acetone.
1 part oil >>>must be LESS than Zero Weight<<<.
Shake well [keep out of eyes].
Apply.
Lightly wiggle stuck fastener.
Repeat over hours, days, weeks.
Here is the Trick of the Recipe: the acetone carries the Less than Zero Weight oil far down into the problem, evaporates leaving the oil behind [this info. is priceless and I will be invoicing].
Heat can also be applied when the Acetone has evaporated.
I have a few gallons of the Less than Zero Weight oil, so if you get up my way, bring an empty pint or quart oil bottle.
Best to you,
iridium.