If the salt is black... Then check that the alcohol has totally evaporated then break the crust of the salt, dump out all the salt, reem with a paper towel, and start a second round. Repeat until the colour of the salt is a more modest yellow tint. You might want to get ahead of yourself a bit and spend some time on the shank with a shank brush, bristle cleaners, q tips and your alcohol of choice. This will make your next S and A treatments go,a little faster.
-- Pat