This is all very distressing not only for the state of your bote but because until now, Vactan has always seemed to me the perfect rust treatment. Easy to use and very effective.
I'm wondering if the nanny state has made the manu reduce the amount of tannic acid in it, leading to it needing to dry far more slowly. Or something.
Have you considered contacting the manu technical dept to see what they have to say about 1) what exactly happened, and 2) how to avoid it happening again, and 3) what if anything can be done to recover the red paint now messed up?
Sadly I fear they will deny any knowledge, insist it can't happen and it must be All Your Fault.... but let's live in hope they don't!