I finished the access panel with some toner then clear lacquer. Here's a test fit.
I gave the main cabinet a final light sanding with 400 grit and headed up to the attic to give it two coats of clear gloss.
It's very convenient to spray up here as there's a big exhaust fan mounted in the window and nothing to get damaged by overspray.
I'll wait a week or two then rub it out.
In the meantime, I'm going to squeeze in one more refinishing project before it gets too cold.