If I have jigs with eyes, I have used nothing but minwax polyurethane and brush on 2 thin coats. I have used these jigs in fresh and saltwater, and it has held up. $18-$19 a can, last me 2 years doing many jigs to sell.
The Devcon epoxy gives a jig a look of "depth" that my polyurethane does not, but I only use it to coat/seal the eyes. Thin coat, 1/2hour to 45 minutes later, second coat. Never had a customer complaint either of it not holding up. No drying wheel needed if you keep it thin enough. Never tried air brushing it.
Have an endless supply of water base UV coating I can get for free at work, but that stuff we use stinks to high heavens, and I doubt the fish would like it lol. But boy the jigs would look great. We use it to coat magazine/catalog covers, so it is very flexible.