magic rust spray DIY. secret formula
bloopers included 😆
places to find phosphoric acid.
farm supply stores. generally named milkstone remover
home depot. concrete etch
Janitorial or industrial cleaning supply stores.
Amazon. I heard it's costly there
Pool supply stores. product to remove scale and calcium buildup
mixture. 19 parts phosphoric acid diluted to your desired strength.
1 part ethyl alcohol (ethanol)