What about Oscar's recommendation of neutralizing with potassium hydroxide after all processing? I've located potassium hydroxide for photo lab uses.
Does anyone know what Oscar meant by "...a mild potassium hydroxide solution ..."???
I asked him about that one time. I told him we were using a solution of baking soda to neutralize after all processing, and asked did I need to get the KOH instead. He said he didn't see that it would matter, you just need to get the acid neutralized. We have continued using baking soda solution and the barrels haven't corroded. The only thing you have to worry about is if the etchant solution gets under a rib where there is a leak. It will leak back out sometime later on and ruin your finish (or even lock up the gun, if it gets into the action).
