I recently built a couple built-in cabinets (two drawers and a door into a cavity where a refrigerator used to go) and some crotch walnut wooden panels to surface a couple interior doors. I don’t know anything about boats, but these clients seem to love the ultra high gloss spar varnish finish. I’ve been using Epiphanes and would appreciate any tips/suggestions for getting a good finish. My limited experience is that it’s super thick and the brush marks don’t really seem to level out over the recommended 24 hour driving time between coats. Should I sand between coats? What grit? What about a final polish after the surface is cured 72 hours with something like rotten stone etc.?

Thanks in advance for any advice and suggestions. I apologize for my naive question.

All the best, Mike