Working in a sulfuric acid refinery I know what acid burns can do. We've had a few very serious cases of people burned. In 1975 yours truly was burned from the knees down with 99% acid. By the time I made it to the shower my jeans were gone and my skin was falling off in the shower. Only missed 4 hours of work but was in a lot of pain for a while. We also use sodium hydroxide, caustic, it is very slippery and eats you up like acid but is at the opposite end of the ph scale. Hellbilly, one good thing, skin regenerates fairly quickly.