I was looking at a decontamination product like the Iron-X for use on my vehicle. I have read multiple reviews saying that this was a good product, But I have read somewhere that the product should be kept away from raw iron sources i.e. calipers/rotors. However, I have seen multiple posts as people using this as a wheel cleaner... what about the warning from the rotors? Do people just not worry about it? Do they just avoid it as much as possible?