I left star San in my aluminum brew pot for a couple of weeks. I just noticed it when I went to brew in Saturday night. The star San left dime sort of slime that was pretty hard to get off and stripped the oxidized layer? Should I be concerned about this? I went and used the pot anyways on sat after I cleaned it.
Sometimes you win. Sometimes you lose.
I've done something similar. I just cleaned the slime off and reformed the oxidized layer by boiling water for 30 mins then dumping. You might get some metallic off flavors in this most recent batch without that layer.