In theory couldn't you also get double the protection and double the durability by adding a 2nd coat of sealant? If something is going to strip the sealant, then it's going to strip the sealant, regardless of what it is bonded to. So, if the PBA has better bonding and durability, why not just use that as a LSP? Just playing devil's advocate.
It is an interesting question and I would love to see a side by side comparison on a hood and a door (to test against winter conditions). One test with just the elements, and one with a wash of a concentration that is just strong enough to compromise the sealant. (Like CGCW) I'm thinking 3 sections. One coat sealant, two coats sealant, & PBA with one coat sealant. If the PBA section cannot hold up better than 2 coats I see no point. Anyone looking for durability as the primary factor should be looking at a coating rather than a sealant.
I will be very interested in reading your results, Bobby. :inspector: