In this session I attempted to treat one of the fuel tank skins with an acid etch and then alodine wash. This was mostly just painting on the solutions and allowing the excess to runoff into the immersion tanks that I was using for the smaller items. Unfortunately, I think my alodine solution is effectively consumed, since it wasn't noticeably changing color any deeper on smaller parts I was trying to immerse. Additionally, the alodine instructions recommend using full strength (not 3:1 diluted) when it will be applied by painting. So I've ordered a fresh quart of Alodine so that I can repeat this process when that arrives.