There is an airbrush under my bench, and a spray gun at my other workshop, but it seems more appropriate for this instrument to brush the finish, filling the pores the slow way, with varnish- cutting it back after each coat or so.
It might look flashy in these pics, but the finish is way off an acceptable standard when seen in the flesh. It will always look a bit hand done, but I'm happy for that to be what I'm about. I'm used to living with my own inadequacies, and it isn't necessary for me anymore to strive to work like a machine, or to produce a finish that attempts to look like machine work. (handy, really, because a $50 guitar has a flawless spray varnish and one could become depressed at the thought)
So, the varnish is going on in layers, but I've also fretted the fingerboard today, and it didn't seem like a very photogenic process, so there are no details here apart from the first five frets on the pic above left.
There is a lot of specialist and trade-secret-sort of knowledge about fretting. It does seem odd to have anything on a fingerboard after my last few decades of naked ebony curving in all directions with scarcely a straight line to bless itself with. Setting the heights and shapes of the frets will take more work than banging them in did, but I'll enjoy all that because it is in these details that I'll create the sort of action that will suit.