The polyurethane seems to be way to thick to flow in a steady mist. The bottle says:
"Can be used directly with airbrush of needle of 0.4mm without dilution."
I'm using a 0.5 and there is barely any coming out.it did mess up my hood, so now I have to resend that area and possibly repaint it. Since it seemed to thick I used some thinner, and still no es nada.
I have a little bottle of vallejo gloss, I'll try that tomorrow.
If that doesn't work it's off the the hardware store for a rattle can of a nice high gloss.
I just had an idea... what about using some Future floor gloss? I think I'll try that instead. I'll test it on the hood first. What do I have to lose? I have to redo it anyway.