I haven't updated in approximately forever, but I have been hard at work on this thing. Here are some progress pics in chronological order, starting with the oldest pic first...
Grain-filling:






Fine-touch grain-filling:



Homemade paint booth setup:



Custom pseudo-neck:





Homemade paint booth and pseudo-neck — ready for painting (well, further prepping anyway):


Priming:



Painting, first coat:


Painting, second coat:


Painting, third coat:




Note: at about this time, I was really questioning whether I was applying the paint correctly. It turns out I was really just too far away from the surface of the body. After this point is when I really started "figuring it out" although of course I am still very much just a beginner...
Painting, fourth coat (much of the third coat removed, FYI):





Painting, fifth coat (much of the fourth coat removed because there was a bit of orange peel on that coat). This is where I start figuring it out even more, though. Check out all these pics because the magic really starts here:






Painting, fifth coat (last night; July 23rd):


I am moving on to clear-coating tonight, so with any luck this thing will actually be finished relatively soon. I still need to finish the neck, but it's completely primed and ready for what I'm going to do to it, which is paint the headstock and satin clear-coat the back.
I must also add that the folks at talkbass.com have been very helpful. I've heard a lot of negativity about the site, but in the Luthier's Corner everything seems pretty chill. It's just a bunch of builders (and prospective builders) sharing ideas and stuff, which is really cool.