I was talking with a guy about using Alum GC and he mentioned a concern about Alum Oxide being a problem. I looked Alum Oxide up on Wiki and my eyes glazed over with all the info about it there. This was half way down the page:
"Aluminium oxide is used for its hardness and strength. It is widely used as an abrasive, including as a much less expensive substitute for industrial diamond. Many types of sandpaper use aluminium oxide crystals. In addition, its low heat retention and low specific heat make it widely used in grinding operations, particularly cutoff tools. As the powdery abrasive mineral aloxite, it is a major component, along with silica, of the cue tip "chalk" used in billiards. Aluminium oxide powder is used in some CD/DVD polishing and scratch-repair kits. Its polishing qualities are also behind its use in toothpaste. Aluminium oxide can be grown as a coating on aluminium by anodising or by plasma electrolytic oxidation (see the "Properties" above). Both its strength and abrasive characteristics originate from the high hardness (9 on the Mohs scale of mineral hardness) of aluminium oxide."
So...is there additional steps to ensure that this isn't a problem? Is this a non-issue? Is there anything that can exacerbate the formation of this oxide? Thanks for any insight as I am total lay person on metal issues.