Looks good.

No reason brush-on nitro can't be as smooth as spray-on stuff. You just need to do some more fine-grit sanding and then polishing once its been dry for a few weeks (almost any finish takes a few weeks to cure properly before it's hard enough to take a proper shine).

If your shielding is still like it is in the photos, then it can be improved, especially the under-pickguard shielding. Just having the tape there isn't enough. It needs to be grounded so it all needs to be continuous. If you've got any tape left, then it's well-worth covering the whole of the underside of the pickguard with the tape. The bridge single coil needs the most screening, but you've got a lot more copper around the noise-resistant neck humbucker. You'll probably also need a much bigger overlap between pieces to get good continuity. Check with a multimeter if you've got one that all the areas have a low-resistance path to one another.

It's also a good idea to run tape up from the control cavity copper to the top right by a couple of screw holes. That way, the screws are providing strong positive pressure and keeping the cavity and pickguard tape making contact. Pickguards have a habit of bending up a bit in the middle and lifting away from the surface.