High temp paint for calipers, stove paint for springs ( although does not look black in photos its a nice matt finish, just to save going rusty again - prob do wheel nuts also )
I tried the grinding wheel on the rear discs, but once the rust was cut back they were so pitted I got new. And was amazed to get OEM new parts for only ~£70 at the dealers. So easy to strip this stuff down too
Wheel refurb is next - thats gonna take a lot longer ....