I finished stripping the door and also did the interior where it shows). the next step is to clean any remaining debris off using a scothbrite pad on my die grinder. The door has the left side done, all bright and shiny. The tool and pad I'm using is shown in the next photo. When done I will go over it with metal-prep, wash with water and dry. It will be rust resistant until I get some epoxy primer on it.