Routlaw,
I have a Fuji HVLP spray system (4 stage noisy one), that I am using Ink Aid for printing directly on styrene. We are pre coating large sheets for stock. There is some loss, but in general, the results are good. I think the losses are very much do to my spray painting ability and trying to get the spray area cleaner. Generally, prints are in the 30"- 40" length range. And the IQ is not for viewing at 10".
I further overcoat the prints after printing and drying, to make them more durable.
We have not sold any of these yet, but are getting more comfortable with the process. Also looking for other pre coats to compare.
Dave