Imron can be sprayed thin but if mixed by the book will come out thick. Add a primer/sealer under and an overcoat of clear and things build up fast. If done well the finish will be durable.

I like DuPont Chromabase as it really shrinks down, so well in fact it will not let you skimp on the prep below. This paint needs a clear over it which can be reduced to get a very thin film thickness overall while still covering the graphics with a clear.