I use the silicon based caliper grease as well, but only after I deburr and "polish" the contact pads with a dremel and a wire wheel. This allows for smoother movement of the shoes.
I've had backing plates that had wear marks which interfeared with the smooth movement of the shoes. I had to carefully remove the rough edges to restore the contact pads prior to smearing the thinest layer of the grease on the contact areas.
Don't use too much grease either of you will contaminate the brake pads.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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