how to Paint Yakima Steelheads?

I have to repaint my Yakima ski racks after each season. The original paint started peeling off with the slush and ice at the car wash. I doubt if Yakima ever used a proper primer. That being said, I just buff the surface , clean, degrease, and repaint with a rattle can. I mask off everything not being painted of course. They are flat black so it was easy to match. Comes out looking pretty good but doesn't last more than a season usually. Ice and slush freezes to the paint and in the carwash the ice pulls the paint. Bike rack shouldn't have that problem so rattlecan job should last a long time.

Im not sure what kind of paint those racks use but I would sand down the paint that was on it, or use a paint remover, clean with a degreaser like above said then spray primer and paint. I cant imagine it being too hard.. tedious maybe, if your gonna sand it, but at least myself I would rather take awhile to do something right the first time then have to go back a few months down the road and fix it again...