Decided to wash the D today. The panels were starting to look kind of streaky and dull, probably from years of stainless cleaners on the panels.
I know a lot of you like the "Bar Keeper's Friend" solution, and have seen some amazing pictures of cars washed with it, but I personally don't like it. The car still has traces of powdery residue in unreachable nooks and crannies, from the one time I tried it.
So I proceeded to wash as a conventionally as possible, with Dawn and water, which interestingly enough I had never really done before, and instead had been using stainless cleaners. Anyway a good old soap and water wash, rinse, drying (each step with the grain), turned out some very good results; the panels look a lot better now. Check it out: