The interior is really in pretty good condition. A couple of spots could stand sanding but precious few. The POs too pretty good care of the interior, for the most part.
So, what I'm gathering is that most folks think that it already has a flat or semi-gloss on it already? That will make it easy. I'll probably use a spray finish like "Helmsman" or a quality polyurethane. The Formica is dated so I'd like to reapply a new color/pattern that doesn't scream "Shagadellic Bayyybe!"