L.D.
I find that Krud Kutter will take anything out of the tub, my kids got latex paint (washing it off themselves) in my brand new bathtub and it attracted everything and my beautiful white tub was so grey and ugly so fast I wanted to cry. No matter what cleaner, bleach, anything I used, nothing cleaned it. Then I found Krud Kutter and it was gone in minutes. I found it at a paint store but you may be able to find it at any hardware store.