Would MC2 help to remove train brake dust and other such cr*p from a car? If so would you use it neat, diluted or what?

So far the teflon stuff appears to be doing the job at protecting my car (car park at work is 2 yards from the line), but my collegue's Escort is a rusty grey where it's impregnated in the paint! :eek:

I think I'd park elsewhere and walk...

BUT it should remove it if its good at removing brake dust from alloys - as long as the dust hasn't been on there too long.