k-frame strengthening

I had the k frame, lower control arms, bumper brackets and inner splash shields powder coated. They were all blasted first. The aftermarket components are powder coated.
I have seen the powder coating go both ways good and bad. When painted the outcome is better known I think? My parts turned out nice just hopping they hold up well.
The k frame has seams and voids that potentially could let moisture behind any coating causing problems? Not sure the powder coating is best.