Supco MO44 Rust Buster Liquid Penetrating Oil

Good penetrating oil.

Works like a charm on brass bushings and leaves them slightly lubricated without the chance of any build-up to occur like how it does with 3-in-1 oil

I’ve always kept a bottle of this in the garage, last purchase the packaging leaked about half a bottle, but it does what it says, sometimes just need to let us set for longer.

Did not work.

This is awesome, cuts through rust esily

Specifically purchased to loosen a frozen screw in a handplane. After 8 or 10 tries I decided I was wasting my time. Took the plane outside and torched the snot out of the frozen screw which surrendered instantly.