Originally Posted by fun ticket
I have discussed this subject with many others and the consensus seems to be "if it is strong enough to eat off brake dust, it has got to be doing collateral damage elsewhere with prolonged use".
I have to disagree with this. You can wash your car with surfex-hd as much as you like to. It eats dirt like nothing else I have ever seen and is very common among detailers in Europe. It is in fact strong enough to get rid of most brake dust. But unless you go crazy with a strong solution, it won't even strip off the wax on your car.
Iron-x works in a different way though.