Yes, Magic Erasers can be effective at removing coffee stains from certain surfaces. Magic Erasers are made of melamine foam and work by gently abrading the surface to remove stains and grime. They don't contain any chemicals or abrasive agents, so they're generally safe to use on a variety of surfaces. However, when it comes to stained mugs and cups we normally just use our 2 ingredient paste and it works wonders! To use a Magic Eraser to remove a coffee stain, follow these steps: Wet the Magic Eraser with water. Gently rub the Magic Eraser over the coffee stain, applying slight pressure. Continue to rub until the stain has been removed. Rinse the area with water to remove any residue. Note that Magic Erasers may not be suitable for all surfaces. They're particularly effective on hard, non-porous surfaces like porcelain, tile, and glass. However, they may damage or scratch delicate surfaces like wood or painted surfaces. It's always a good idea to test a small, inconspicuous area first to make sure the Magic Eraser won't damage or discolor the surface.