On 2010-05-11, Karl Townsend wrote:
Phosphoric acid is a better choice. It leaves a surface just like a primer
coat on the metal. Actually retards further rusting. its the active
ingredient in many rust products from naval jelly to rusty metal primer. Buy
it as "lime away" for $4/gal at farm fleet stores.

That would be a good excuse to go to a Farm and Fleet store. Does it
evaporate, like muriatic? I suppose I can dissolve it in water?

i