Don Stauffer
I even use it as an overcoat for my inkjet-printed decals. For those, I do need to let the ink dry three days before overcoating. Even then I mist on a light coat first, wait a minute or two, and then go back over it for a final coat.
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When I first started printing decals, I had a lot of trouble with the color running. Letting the ink dry for a couple of days solved that.
Do be aware that spraying the decal sheet with film or clearcoat then means that you will need to cut out the decal carefully around the edge of the image.