Ditto what Ed and Jon said. Depending on the part I may or may not use alodine. I too have moved away from chemical etch in favor of the maroon scotch brite pads. I clean everything with Prepsol (use your degreaser/cleaner of choice) after scuffing and shoot the AKZO. Like Jon said, it's tough as nails and I have yet to have any of it scratch off even after some rough handling (like on my roll bar where there is a lot of contact from adjacent parts). I have also had good luck shooting my interior color coat over the finished product, but that's a different topic.
Empenage complete, wings complete, tip-up canopy complete, starting wiring ...