Paint colour for backing plates ?

I have actually had my dust shields professionally re-galvenized. Very disappointing. Re-did it twice. Not happy. What I learned- if you have brand new mild steel, go ahead and galvanize it. But on old, used mild steel, even on something that has been previously galvanized, imperfections unseen will now come to the surface and distort the new galvanize. Bead blasting will not fix it. I ended up painting the dust shields silver. My loss is your gain. Thanks for bringing up such a painful subject. Hope this helps.