LPT: You can reverse a sunburn with Vinegar. I live in the Caribbean, and one of the first things I learned was to keep a gallon jug of vinegar in the shower. After a day in the sun, or even multiple times a day, I will soak a washcloth in vinegar and let it drape over wherever I’m starting to feel the beginnings of a burn. This also works for grease burns, or even friction burns like chaf…