Are you sanding between coats? Between the last two blue pics, there's a "thing" between the two pup cavities.
Sanding every two/three.
The 'thing' is a bit of dried paint that found it's way into my spraygun feeder/cup/hopper/thingamajig.
Experience has taught me that, as much as I really, reeeally want to flick it off then and there I should LEAVE IT THE HELL ALONE until it's dry.
... might go and flick it off now actually... hold on....
*flick*
Gone.
Before you ask, the thing at the bottom is just a piece of masking tape covering the (sizeable) ground wire hole to the bridge.
... I should probably remove it though... wasn't really thinking.