Woops . I was asleep at the wheel. The chassis side brackets were bare steel typically and not painted. Sorry about that
My interpretation was you meant the "ears" of the insulator that the long bolts pass through were SGB. I thought they would be more on the side of low-to-no gloss black. Please clarify that if somehow the waters were muddied.
I am asking for recommendations (per John's first images of the thread added here to review) PLUS I have added a picture of what I currently have (attached in the last image).
Furthermore (off thread but relevant), aren't the bolts and lock washers supposed to be a zinc plating? AMK provided bolts (seen in last picture) are clearly Phosphate & Oil, I believe they are incorrect.