Quote Originally Posted by Claven2 View Post
I've had luck in the past swabbing nitric acid onto the wood in the areas where there is rust staining. The acid will dissolve the rust out of the wood. You need to dilute it and go lightly. Rinse well with water.
Nitric is stronng stuff, and is actually an oxidizer, ie. Causes rust. Better choice is hydrochloric acid, also called muriatic acid when diluted ( swimming pool additive), which is a very good deoxidant, ie dissolves rust, which is a form of iron oxide.
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