I was tying to change my car's headlight bulb, so my hands got some red liquid from car battery. It doesn't hurt or anything but it doesn't go away even few hours later after wash. It looks like it got some red marker on my hand. Anyways the red liquid from battery looks like the treatment which my auto bodyshop did. When I change my engine oil in Auto bodyshop, they said my car battery needs to be cleaned due to some white substance on the battery so they did some treatment on it After that the white things are gone but I can see some red sticky things near the wire is connected.
What is this? And is it just safe to just wash off with water?