Orange Peel Issue

cibula11

I've primed and painted (now two coats ) of valspar's tractor and implement paint on my JD 318. The first coat seemed to have issues adhering as it sagged level pockets of lighter and darker spots. I sanded smooth and applied the second coat adding a bit more hardener and added more air pressure as well. It was much smoother, but noticed that the coat has more of an orange peel look than a smooth glass-like shell. What are my next steps?

I don't know if I should just spray another coat, without sanding, or if i should sand it with a fine paper to scuff (800 grit) and then spray another coat, or if it will buff out with rubbing compound. Any direction would be appreciated.