I know there are a million threads on the subject of painting a frame, and alot of criticism for doing a rattle can home job.. but I believe! Anyway, I have meticulously hand sanded a high ten steel frame down to the bare metal with 320 grit as final paper, and meticulously degreased it. I am using Dupli-Color sandable primer and a Dupli-Color Acrylic Enamel topcoat color. Will applying a self-etching primer first really make a huge difference in the durability and adhesion? This coming from someone who can paint well, just never on bare steel. Thanks!