Thanks, I thought that might be the problem, although I have not had this problem with the clear coats I have used before. It's definitely not grey in the background, although I am glad to know that is something to watch for!

The decal is inkjet-printed, and then sprayed with an acrylic sealer. It is possible that in my haste to try it out that I nicked the edges a bit with 400 grit sandpaper. Should also be noted that the pic is larger than life-sized. The piece is only 70mm at it's widest, and this was a "reject" logo from a previous project. I always and spray several in the hope that at least one will be good enough to put on the project.

I have another try going on the other side, which I got pretty glossy before putting on the decal. Hoping it will look better.