I mixed up a small quantity of SEM, and cheated the instructions slightly:
I added a small amount of SPI urethane reducer.

Previously I had run the spray gun wide open (both fan and fluid wide open).

First practicing on a disposable/different surface, I played with the adjustment and technique until I arrived at what I was shooting for (no pun intended).

On my particular spray gun, that ended up being fan wide open and fluid tip turned in about a turn and a half to reduce fluid volume,
and I also held the gun maybe twice the normal distance away from the panel (I would estimate about 12" away instead of the normal 5 to 6 inches).
Air pressure was in the mid to high 20s. (Your rig will work differently, but the general idea was to reduce fluid volume until it came out very slowly in discernably separate "dots"
rather than an atomized liquid). I used 1.4mm tip (but only because that's what was already in there from the previous shoot).

No specific overlap was used. I started with no overlap at all, then reversed direction, and then "dusted" it until the texture evened out across the panel.


....and here's what I got.