Great... I just read the FAQs for U-pic, Etsy's insurance provider. They DO NOT cover paintings/fine art.
So all you fine artists, better use USPS insurance, as they will cover it. U-pic will not. So, I guess it's back to printing labels on-line thru the PO. More expensive, but Etsy's insurance appears to be useless for painters, printmakers, et. al.