Vinegar For Your Firebox?

[alecksjaycubs]

While perusing a Face Book group I saw someone talking about cleaning their pit and they used vinegar sprayed in their firebox to neutralize any alkalinity, thereby helping to prevent rust. It was the first I'd ever heard of it. I am by no means a chemist but I'm sure there are a few hanging around here.

What say the Brethren?

 

[ironmanerik]

I know it works when refurbishing cast iron pans. The Griswold site says you have to stop the reaction or it will eat the whole pan.