Today I had some students draw all over my classroom walls with markers and when I went to go wipe them with a wet paper towel it just smeared a bit. But when I used a wet magic erasers it came right off. What’s the difference and why does the magic work so well compared to paper towel?
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ElI5 : it’s basically a very fine sand paper. You’ll notice on some things it actually removes part of the finish from it.
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