I see your latest post.
Now let me be clear. Anytime you can seem to see coverage at 4 coats, the paint has gone on too heavily. 2' second is the slowest a Duster can be, and the use of that speed is determined by factors such as paint thickness, mist effectiveness, and pressure. But it should not be a universally accepted speed, because if a slight misjudgement is made....and worse, such heavier coats are applied too soon after another, Orange Peel, or some degree of surface texture beyond "smooth" will result.
If you but step back, and let the screen really dry (if no longer tacky, put a fan to it.)
You then look at the screen surface a describe it.
I would at this time say a very light but screen wide sanding with a 3" x 9" Large Fine Frit Sanding Sponge*
be called for (...once screen is "dry"
Home Depot Drywall Tools dept.)
Your not really removing much material has you are smoothing out any / all bumps. You simply sweep the surface with barely enough pressure to hold the sponge...you use your palm to distribute pressure equally. I cove a lot o territory when I sweep sand, and always do about 3 sweeps up/down, then move to one side and onward. Your screen is small enough you should be able to sweep sand from top to bottom with each stroke. If not, do the cenetr as widely as possible, then the Top and Bottom respectfully, over lapping the top and bottom center edges. Kiss....don't scrub.
Wipe clean....and then apply 3 more coats at 3' a second! LOTS of ovelap. Speed dictates amount applied....which without significant and equal overlap would be sparse indeed!
All the same the smaller amount helps one cover with the least amount needed, and prevents the terrors described above.
Once the 3rd new coat is dry, look for any trace of splotchy-ness
When a careful examination shows a equal, even color across the screen......do one more Duster.....just to be sure.
That's how I do it. Usually 8 light Dusters. Fan assisted drying and room temps elevated if possible. 20 minutes between coats. Average time to paint screen...2 hrs 30 min.
But that's me, and whadda I know frum nuttin'.