I told you to stay tuned to this spring to see how the POR-15 held up. Well... let me tell you, it is still rock solid. However, both my bumpers are fully infested with rust.
The places that have powdercoat you can see the rust coming through. I really need to strip down the whole bumper and start over. However, in the meantime I will just continue to use the POR-15 until I have the funds and time to sandblast the bumpers.