Maybe lay it down a little heavier (slower gun travel?)
Also your data sheet suggests using up to 20% reducer. That will help it flatten.

I haven't sprayed urethane primer, but adding some reducer sure helped with my top coat, which says it can be sprayed right out of the can.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.