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A slight variation on the theme this time as I knew I was going to properly flush the brake system and I wanted to split the calipers.
I took them off the bike, gave them an initial soak with SDOC and then attacked them with the hot soapy water and scrubbing brush. That got rid of the surface layer but not in the gap where the disk sits, so then I split the calipers, covered the halves in SDOC, scrubbed that off and left them to soak in very hot soapy water before giving them another good scrubbing with a stiff bristle brush.
Gave the pistons a polish with just a soft cloth until all the residue was gone, a thin coat of red rubber grease, pop them back in and re-assemble calipers.
But, yes, there was a lot of scrubbing like buggery to get all the baked on grime and brake dust off.
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