I use beeswax in the shop, It works well on exhaust manifold studs that don't want to turn most of the time.
The thing about beeswax, is it withstands a higher heat than penetrating oil.
You can heat it up with a torch (studs/bolts) and keep adding the wax, reheat and do it again.
You can get the studs too hot and they will ignite the wax, but no problem really.
It is a high temp lube sort to speak.
It is an old steel mill trick.
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