I know I'm posting on a old thread but I figured why not share some information. I found a website that will powdercoat your Supertones before they ship them to you. I've included a link and a pic showing off the colors that they make. Hope this helps!

(It's a Subaru website but the horn is universal. I don't know if the wiring harness they offer would work on our cars but I'm playing it safe and assuming it won't, but it might.... And I wouldn't bother with the bracket they sell either since, again,
this is a Subaru website designed for Subaru owners lol.)
https://subimods.com/hella-supertone...003399801.html

 

Some good info re: powder coating the Hellas. when I had my previous install, I even considered painting the horns black to make them less subtle. if I were to do this setup again on my current xB (2013 White xB), i would most likely plasti-dip them and save myself some $