I really do rinse it very well and always have. A good while with hose pipe all round. Occasionally my sons GS poor state pisses me off so I do his in same way and his discs don't rust like mine. They surface rust where pads make contact but that's all. Plus on his GS and on my previous one there is black paint above and below where pads make contact but bikes like mine and your triple black GSa's no longer have this. Another cost saving ?
