You put soapy water on the print?
Sure. It's not something we'd do every day on a sheet of vinyl, and certainly not on a large sheet of vinyl, but it works. Of course you might see the seam up close, but if the image is 20 feet from the road, you won't see it.
We wouldn't run it back through the laminator. Instead we'd use a soft squeegee. It's the same technique used to float frosted vinyl on windows.
Admittedly, it's pretty rare we'd do this with a sheet of vinyl. But we often do this to replace a letter on jobs where the letters are printed and cut. If we ruin a letter, we'll take some scrap (sometimes pre printed for just such an occasion), float a piece of laminate over it, and put it back in the cutter. It's cheaper and faster than printing off a roll and running it through the laminator.