Yeah, the miracle cloth is impregnated with unobtainium. They use the cyclotron at Brookhaven National Laboratory to get it into the cloth. Don't set it down next to your camera.(g)
Seriously, though, clean 'em up and then coat 'em with a good wax or something. If you have not used muriatic acid before I would not recommend it. Explosions and severe burns, if not blindness, can occur to the unfamiliar. If one feels the need to use any acid, good old vinegar is the place to start. Not fast, but safe.
“Scientists are people who build the Brooklyn Bridge and then buy it.”
Wm. F. Buckley, Jr.