Singing more praises for Mr. Clean Magic Eraser

Gotta agree on the Magic Eraser. I too have used it on the plastics such as light trims, vent, etc. and it removes the yellow nicely. I've used it on various things, but won't use it on my gel coat in large areas, small scuffs yes, but that's it. Will the abrasive material in the eraser harm the TPO or rubber roof?