Muriatic acid

Holy frijole...I haven't poured anything that smoked since college chemistry class. Got a whiff of it and I'm sure that was a blunder. I'm amazed you can still buy this stuff. I got some to clean up ceramic planters and I'm thinking I should have just got new pots. I was going to do the toilet clean with it, but that's out.

Any experience with this stuff?

Yes, stuff is nasty to use, use a charcoal respirator and do it outside. Then rinse your parts or whatever with baking soda and water to neutralize the acid, final rinse with distilled water helps it not to flash rust quite so quick when working with steel.

Rinse and blow dry right away.

Used it on a small area on the under body of a mopar just in front of the rear wheels on the underbody.

Clean, Dry, Prime and Paint . . Brand New
Good bye surface rust.

For sure use saftey glasses and rubber gloves when working with the chemical acid. Long sleeve shirts too, one spec can burn like Hell. Fush with water if you get any on you.