I've never endured the butt burn, although I did experience skin errosion around my stoma, which was alleviated by the application of ilex paste, which can also be applied to treat and prevent butt burn.
I often say, it's best to have the ilex paste and not need it, than need it and not have it.
Before discovering the ilex paste, I tried evey product available and nothing worked, only the ilex.