That simply looks amazing for not being sprayed. I'm getting great results spraying but a lot more work. How long does it have to set up? I'm assuming even though it looks perfect you'll still want to wet sand it to completely even it out?
That West System takes overnight to get hard, tacks up in a few hours. If you do a batch in a multi cue booth, it would make sense to do 5 at a time...certainly. I can get basically the same results with Enduro and a foam brush. The Enduro can be sanded and recoated every hour, but I would suggest 36 hours or more before final sand and buff.