I'd like to chime in.
Having an extensive career background in coatings I can assure anyone that there is absolutely nothing better than any 2 part epoxy on bare and clean steel for corrosion resistance.
POR products are a version of urethane and a moisture cure at that. Any 2 part product (ones needing activator) will always outperform other single stage type coatings.
Think of it this way....when adding an activator you're actually finishing the manufacturing process which can't be done at factory due to the curing times. Air dry or moisture cure products are easier to use but come without the benefits of a 2 part product.
