In the absence of any other replies.....
I don't know what automotive refinishing/ specialist coating / aircraft paint manufacturers are active in the USA...but they are the sort of Googoo searches you could make.
Monsanato? seems to ring a bell.
Sikkens is a top-end european maker. I'd suggest that you look at the whole paint-system,from bare metal-prep through to sinal topcoat/lacquer.
Even on touch-ins you can find that the boundary of a repair-patch suffers problems of adverse reaction/ checking/ softness/durability.....
I am sure you will get full technical assistance from any major manufacturer.
(in UK, the distributors do not seem to have staff trained to a high-enough level.)