Old enough to know better
Join Date: Dec 2006
Location: Beacon, NY
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Re: Low buck projects- Let's see 'em!
David, I believe the erasers are microfiber that "disintegrates" as it is used, kind of like a solid block of rubbing compound. I love them, they are one of my favorite inventions. They do leave behind a residue, though, so I agree with the rinsing idea.
I've also learned, on a new surface, to test the Magic Eraser in an inconspicuous spot. It can effect some finishes (making them more matte). I wouldn't use them on the hull or glossy painted surfaces.
Yes the magic erasers are quite abrasive. I think I have read that they are about equivalent to 1500 grit sand paper. It has been awhile, but I used to frequent a lot of car detailing forums.