It’s a generic Nardi-compatable horn button. The button part is a non-branded piece of black plastic that has a convex shape to it. Laying epoxy on a convex dome? That’s like trying to pour a glass full of water with the glass upside down. But I didn’t let that stop me.
I cut four vinyl stickers to use as the base, thinking I’d probably ruin at least 3 of them before I got this right. I was only partially correct. I got the vinyl on the black dome perfectly on my second try.
If you have a horn button that can use a very custom touch, holler at me. This one is the only one in the world like it. You can have a unique, hand-crafted piece, too!