POR 15, any expierenced users?

Powdercoat is the best solution for this

I agree for control arms.
Powdercoat "is" a great solution in a lot of instances. The prep also needs to be perfect and the customer needs to understand that repair to a powdercoat finish in near impossible. In most cases system failure requires a complete redo. A lot of people think powdercoat is the end all do all. Just be aware. It has some short comings.