Dan, with today's catalyzed finishes, the only thing an oven does is speed up the flash times so that vehicle can get pushed out and the next one pushed in. Production shop benefit....
That's all an oven does anyway. It's like putting a fan on a drop of water. It dries faster but when it's dry it's no drier than one that didn't have a fan blowing on it. I shot a LOT of "baked" enamel and the only difference from "regular" enamel was the additive we had to put in to keep the heat from changing the color of the paint. It was no harder or more durable than air dry paint.