I don’t know much about sabers, but I work with a lot of high build catalyzed primers and high solid urethane clears and do know a good bit about that. It is gonna be a very hard ask to get paint to round out those surfaces. Especially so evenly. No sagging in one direction or another. No flooding in the deeper areas... That rounding is absolutely not the result of thick paint application IMO. Just my two cents.
Can’t wait to see this all come together, you always do very nice work.