Well, I must admit, she wasn't REALLY soaked, but had horrid black greasy spots here and there and a bath did get rid of at least part of the nasty black goo. I did stumble on another remedy: waterproof eye makeup remover, though one has to remove the excess oily residue afterwards and it does work better on short fur (as on ear tips). The problem isn't in our garage but next door, in the form of a truck which the cat in question hid under yesterday because she was surprised by a sudden thunderstorm. Our other cat apparently found a better shelter as he came home clean. . .On a more humourous note, I saw that this thread is right next to the one about Mrs. Slocomb's pussy. . .
Once again, many, many thanks for all the good advice. I knew I could count of all of you.
cheers,
Aux