Why is it good to “rough up” a surface to be glued? Wouldn’t a smooth surface give the best adhesion?
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Take a glob of playdoh and push it into a mirror. Then try to take it off. Now take that same glob of playdoh and push it into a rug. Now try to take it off. Which was easier, taking the playdoh off the smooth surface of the mirror or the rough surface of the rug?
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