HI Fox. You might want to try a epoxy primer and paint.
I understand POR 15 is not UV resistant and needs a top coat.
Like some things that everyone sees advertised and most folk use it may not be the best choice.(think WD-40/ armourall)
Not on my truck thank you!
After all your good work and fine results protect it with the best coating.
I understand winter has hit with a deep cold front.
stay warm. Howie
