"swimming pool acid is the same thing. You can get it at any swimming pool supply place. They sell it by the gallon, and often in a two gallon pack."

You know, that's what I thought. I'm helping my mother get ready to sell her house, and the last owners turned the carport into a lanai... unfortunately, the carport cement had been painted green, so now the walkway and driveway are bare cement, but one strip of the walkway is partially green with old paint. I was pretty sure sulphuric acid was what we needed to etch the cement with... guess I can split the cost with her. Cool.

As far as battery acid, well, I think I'd rather buy the pool stuff. Must be psychological... same stuff, but somehow pool acid sounds safer than battery acid... :roll: