I am definitely going to try some of this primer.
Have you ever tried placing the parts in the sun? I wonder if some heat would accelerate that process.
It's a paint but yeah I've had parts outside in partial sun and it's still a few days it seems to fully cure. Try testing it out because my memory could be failing me but it's definitely not dry enough for install after 24 hours. I painted my Duster steelies with it and the paint held up a good 15 years. It's not as nice as powder coating but I can guarantee it held up 1000% better than Rustoleum would have in its place.