What types of vinegar dissolve calcium?

White vinegar can.

Probably a lemon could help.

But I know that on pennies when they get calcium buildup you can use coco cola or ketchup to eat it away.

Ketchup can also clean real silver and real gold; Mean while if you get stung by a bee and tape a penny to the throbbing area pain as well as vennum will come out.And a Coca Cola put into a container of water will sink all the way to the bottom.

Just some useful tips(: