These were pretty bad.
Took the bearings and spindles out. Cleaned the hub with brass wire wool and some machine oil.
Tried a degreaser first of all. No luck
A friend owns a media blasting company and tried vapour blasting them. Made them grey.
Dishwasher x2 cleans. Helped.
Sanded the brake rub off and got some colour on the brake area.
Wet and dry sanded the rest till my fingers said no more.
Dishwasher again and then sprayed with WD40 while they were hot.
Used liquid bees wax on the spokes but not the brake area.
Took some time but really pleased with the results. Getting in corners a pain and dremel helped.
Some guys dye them but the dye rubs off on the brake area eventually.
The colour is injected so will clean up.