How should i treat a chemical burn from magic eraser?

Aquaphor Ointment: Mr. Clean's magic eraser doesn't actually contain any bleach or other chemicals. It is made of a fiber called melamine, and is essentially like a very, very, very fine sandpaper or brillo pad. So if you have a burn from a magic eraser pad, it's likely because you "sanded" off your top layer of skin. Try covering it with a thin layer of aquaphor healing ointment while the skin grows back.

Keep it covered: Wash the area, keep it clean and have it covered. if it is a small area you may use a band-aid with neosporin. If it is larger than that, apply over the counter neosporin ointment and keep it covered with gauze.

Ocular or skin??: If ocular lubricate heavily with tears, if skin, gently clean ; short term use of otc polysporin (bacitracin and polymyxin) antibiotic. Seek care if worsens or does not respond.