Looking very "straight", Marty 

Just comparing notes - in between coats, I usually use 600 grit wet/Dry, and I usually dampen the sandpaper and leave the cab out in the sun to dry. It gives me a REALLY smooth cabinet for the second and third undercoat. After the last undercoat - I leave the cab for a week.

but - I usually "hand" sand the cab just to get a "feel" for the job.

I'm interested in your methods.

What grit are you using on your sander ?

what type of primer are you using ?

The results are outstanding !

The vast majority of other sanding was done by hand (float) pre-primer...Primer was K & H acryilc primer (1 part primer, 1 part thinner) sprayed on with gun.
Was sanded in between with 220 grit on the air orbital sander.  It works a treat.  Very lightly used and it pretty much sucks out the dust so no clogs.  The whole cabinet was done in two disks.  Wipe down afterwards and very smooth.
I was surprised how well it came off the gun.  No joggers or peel.  My spraypainter advised that the acrylic will shrink a tad, but with decals going on shouldn't be a drama.  I found a really good auto paint place in Thomastown and I picked up 4ltrs of thinner, 1ltr prepsol, 2 mixing cups, 5 filters and a big bundle of mixing sticks for $40.00.

Out of interest - on the decals on the headbox (part removed) I used prepsol on a rag to test clean and came up OK too.  Maybe something to further test later on.