I know back in the dark ages when I had my Hillman, the Rootes workshop manual used to specify white lithium grease for the contact patches on the drum brakes.

Oh yes I remember those days when you would pull out the wheel bearings during a service and dunk them in a can of petrol with bare hands. Usually followed by a blast of air into the drums sending a cloud of dust everywhere. Never did understand what that big "A" sticker on the boxes of shoes stood for.

Coppaslip was very good on exhaust manifold studs when the manufacturer didn't fit brass nuts, always used it when re-assembling the manifold. It was always used on turbine housing studs too, so well capable of coping with brake caliper temperatures.

I think that is part of the joy of using it on steel parts that get hot, the carrier fluid might dry out but, leaves a copper layer to stop parts rusting together and stops oscillation between pad backplates and other brake components from creating noise.

For what it's worth, car manufacturers have gone to using copper plated steel nuts on exhaust parts now and they are a pain to get off. Last time I had to drop the whole exhaust by cutting it in suitable places so that I could get the rusted nuts off the DPF by grinding them away until I could unwrap the remains of them off the studs in the DPF flange. Assembly was done with a good helping of copper grease on all the threads. and new nuts.