sh*t, late to the party as usual. Sorry Joe.
All I can offer is my experiences, I used the Plasikote product that you’ve seen me reference in my thread. I’m a bit hesitant to make any recommendations to absolutely use it or not simply because I don’t have any long term results to provide feedback on it. I can say though, the science and chemistry is sound, any product like it that will convert the active oxidation into an inert compound. I also can safely say that I had no reactivity issues using it underneath the epoxy and high build primers.
I’ve used RustMort in the past as well with satisfactory results, the only thing I don’t like about that product is that it needs to be rinsed with water following the initial application and conversion. Putting water on bare metal is not conducive to good results in my opinion, and kinda defeats the purpose.
Going back to the PlastiKote product, I’m not sure why you think it’s only available on their website, I picked up my bottle locally at Princess Auto here in Canada, so you should be able to find it similarly, possibly at your version, Harbour Fright. 😉
In summary, I’d say that nearly any product that you can find that has the active ingredients to convert the oxidation process is going to be equally successful for ya. Not sure this helps at all, but it’s alls I gots.