No expert here but I've herd some negatives about dipping, all the metal you can't get to is now raw & will be a problem in the future, a friend dipped a charger, we spent days trying to get por 15 into all those spaces, never knowing for sure if we got em all?
I did my first hood, & rolled it with por 15 in all the framing after taping all the holes, after a year I tried to take the skin off because I still had rust problems, well I missed a lot & where the metal is tight(2 or 3 layers) it did not go in at all.
One solution is the "e" coat process, but that about doubles the price. but your sure all metal is protected
On my next car I'm inclined to leave whats good alone & only deal with the parts that are rusty, then coat everything I can with por 15 or eastwoods stuff.
? we did do acid baths, not sure what the difference would be on alkilne.does it provide long term protection to the metal you can't get to? Rich.