You should've had them powder-coated, or at least painted them to slow down corrosion.
*runs out of the room*
Apparently, you've never tried to destroy professionally-done powder coating. It's far from easy.
of that i have ZERO doubt..i did a custom built boat trailer with my own steps and running boards dead of summer around noon on a clear day in FLEET white......i got sunburnt off the reflection of the trailer and was half blind when doneWas really hard on the eyes painting out in the sun.