I got a quote for engraving my panel at it was $996. And that was if I did the painting. Too much for me.
I looked around and finally settled on dry transfer labels that can be made to my artwork. The place I found is imagetransfers.com. They have been very responsive and helpful.
A one color, 8.5" x 11" sheet of custom dry transfer graphics is $175. Much less expensive than engraving, and they should look better than stick on labels.
I'll spray a layer of clear coat on after application of the labels.