1. Clean that part of the body fast and wash off the acid with as much water as possible because timing is very critical here. The longer you delay cleaning it, the more serious will be the damage and the scarring.
2. Get a lot of water and stay under water for at least 15 minutes, preferably 30 minutes, and then change your clothes and only after that should you go and seek medical attention.
3. If sodium bicarbonate (baking powder) was available, the victims could also mix it with the water and apply on the affected area to neutralize the acid''s effects.
4. In the worst-case scenario, where no water is available, wipe the affected area clean as much as possible.