Halfrauds only had copper grease in there brake section, swore i saw it some where like you say called 'brake grease'.
Rob thats what i was concerned about damaging pistons really as any grease will do for the pins and stuff.
U could use those little bags where you squeeze the seal shut at the top not sure what they are called though, had some copper grease sent to me this way once for an engine bolt kit in the post

