Iron Remover not enough?

[627PCFan]

I just finished a white Audi A-6 last night which was contaminated with a lot of iron from the brake pads. I made 2 trips around the car with Megiuars spray clay which has worked great for me in the past, but this time it really didn't touch the rust/orange spots. I upped things by using a yellow bug block, didn't help. Eventually I grabbed a old foamed purple wool pad and polished most spots out. Anyone ever have iron remover not be enough?
75103

[The Guz]

Was it actually a ferrous material? Could have been something unrelated.

[Mike@ShineStruck]

Try some acid based waterspot remover!

[Eldorado2k]

Try this.

https://uploads.tapatalk-cdn.com/20220405/883d2f2a53d2570e6d489060e9b1de0c.jpg