Update
I've sanded gently for 2 weeks, and I've made a decision on finish. I am beginning by finishing the sides of the guitar with a gloss black enamel. The quality of the grain in this area is not good, and I want a visual division between the front and back, both of which will be finished naturally.
I begin by taping the binding carefully, then applying 2 coats of primer, and the first coat of gloss black. Each coat taking a day, with significant sanding between coats. I imagine 4-5 coats of black will be required. I am using an artist's brush to apply. It is very much down to thinning, and sanding to get a flawless finish.
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