Seeking advice on applying clear powder coat

Howdy FABO, I've been trying to learn how to powder coat lately. I've had some pretty good success with opaque colors on sand blasted parts, but this last project gave me fits.

My Pops turns pens as a hobby, and usually he applies CA glue as a durable and glossy clear coat, but it's tedious and time consuming. He asked if I could do a clear powder coat on his latest batch, so I gave it a shot.

The parts were polished brass .308 cartridges, cleaned with acetone prior to applying the powder. The powder went on fine, and the first coat flowed & cured nicely. However, it was hardly noticeable that there was a clear coat on them at all -- just looked slightly more glossy than before. I let them cool, applied a second coat, and all but one (9 total) ended up with terrible orange peel.

Does anyone have any tips on applying multiple coats and/or how to avoid orange peel?

I didn't take pictures of the orange peel before removing the coat, but this is with two coats of clear.
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@CudaChick1968 @harrisonm