I'd opened a thread about the AL brightener a week or so back...it's widely used at truck stop washes, has HF and some inert acids as well...anyway, will look for the link and post it in a bit.
Pretty sure in my climate right now (dry and hot) I'll be good for a bit, but will look into sealer as well.
I was mostly curious if a converter was used (after getting the big chucks/flakes out), could you just install a tank and run it without worries?
I know that boat guys use lots of stuff in there fuel to keep it stable, etc, while the boat sits, and is this why they have good luck over the long term?...I really don't know.
Edit:
Alan...here's what I used and did, turned out real nice.
https://www.fordbarn.com/forum/showthread.php?t=142779