Surely they sell "swimming pool acid" in the UK...which is "Muratic acid"..............in the U.S. it can be purchased at most grocery stores in the warmer climate areas...........I know they sell it in Italy and Spain because I have bought it there.......?........U.K., not sure...........

And Chuck, I didn't think your cars and trucks leaked oil.....?............You could also use it to clean your BBQ grates.........!.......(probably against the law in California...?)

Doug