So I left off after fiberglassing, sanding, sanding again, and painting the A-pillars. Next I wrapped both A-pillars in black grille cloth using 3M Super 90, and painted with three light coats of black fabric dye for color consistency.
In reality, I didn't install the A-pillars until I was ready to re-assemble, but for the sake of continuity I will show the installed pictures of the A-pillars here. Note that because both shots were taken from the driver's seat, my flash made the left A-pillar look much lighter than it is. And yes, his cheap-o GM dashboard is a little gimpy as well, the owner assured me a fix was in the works.