If you get sick, you probably have poisoning. The inside of old cans are lightly coated with lead [or is it Zinc?]I think.... either way it is poisonous, so given all the rust on top it looks like it has oxidized/broken down and there might be particles mixed in with it. But I don't know how long ago they stopped putting that stuff in the cans. Ask Cimarron, he's the chemist.