The sharp stuff got me again tonight. I stopped once to pump some air into the tire, but managed to get the horse back to the barn without having to fix it in the rain. There's nothing so black and mucky as aluminum rims in the slop. Some of that inky black stuff splashed up on the pristine front of my cream Rapha rain jacket... not that I hadn't considered that possibility, but I'll admit it did have me questioning the wisdom of selecting cream over grey.
After further consideration, I have no doubt the splatter would look equally bad on the grey jacket.
I rinsed the bike off, fixed the flat and set about trying to get the muck off the jacket. All it took was a liberal application of Shout Advanced Gel stain remover* (product plug) worked into the spots with an old cotton sock. To my surprise all the stains lifted with some vigorous rubbing. Given how many spots were on the jacket it took a good ten minutes to get all of them. Then I laundered the jacket on the delicate cycle, warm wash/cold rinse... and it emerged good as new. Now that's good news.