I am parting out a 300SD and thinking i would like to save the brake calipers for the day that I want to put them on the 240D.... but last time I pulled some rear calipers off they siezed up in a matter of weeks...

two questions, Is there any way to mothball a brake system so it does not rust when apart, (could I flush it with WD-40? except that is probably bad for the seals..)

is there any repair to a caliper that has gotten stuck.. and once it is stuck, is it worth saving or will even a rebuilder of brakes systems turn it down?

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46 WDX Power Wagon

84 300TDT daily driver