The Fezman· Premium Member
i used to work next to a machine shop that specialized in rehabbing rendering plant equipment (they cook animals into goo to make stuff with it, was a NASTY place) the old machinist that worked there gave me a pint of a silvery black goo in an unmarked can, i know its not never seize, i think it was a mix of graphite, lead and some kind of grease, he told me it was his "special stuff" and if i ever planned on taking somethings apart use it, at the time i was working on heavy equipment, trash trucks, bulldozers, track hoes, pans ect all dirty disgusting things. every thing i ever put it on came right apart with out issue, now i use it very sparingly on break drums bearing hubs and the backs of alloy wheels, every wheel i have ever put it on fell right off, my other mechanic refuses to use it and is constantly having to beat on wheels to get them to come off, it doesn't take much just a few dabs with an acid brush and a smear around.Well not so much on freeing rust bolts but putting a compound on them so they always come free.
My father used to work in a foundry. The problem they had is if metal is heated and cooled continously the threads become corroded just the same as exhaust threads. They found that applying a mixture of graphite and oil always made the threads easy to remove. Its easy to apply because the oil makes it a paste, the oil does burn off but it leaves the graphite behind.
He had an old VW camper 1968 and he was always fitted exhaust systems due to corrosion. He decided to buy a stainless system so it would last longer, he coated the threads with the compound. Many years later it needed changing again due to the parts that weren't stainless corroding. The nuts holding the exhaust to the cylinder head had corroded with no signs of flats on them. A light grip with moile grips and they came of and the compound could still be seen on the threads. This is a good tip if you keep cars for many many years. I've applied it to my car though the turbo nuts and bolts aren't easy to access.
as for penetrating oil i use PB blaster and a product called zep 45 the 45 doesn't work nearly as well as it used to they took out the 1.1.1 that made it creep.
i also use a lot of wd40, mainly because its "paint safe" and wont attack rubber or plastic like PB, i spray it on bare metal if im not going to be able to prime it right away to prevent flash rust because it washes off easily and evaporates and leaves a nice film on things . i also spray all of my nuts and bolts with it before reassembly, a lot of body bolts like to rust they also cut there own threads so lube helps things go back together easier...
oh and i HATE the smell of PB lol... not to mention it burns like heck if you get it in an open wound .
one of my favorite is my smiths torch with a 0 tip on it, i can make a needle point flame with it and heat almost anything i need to with out starting too many fires.