Two ways that work with anything.

1. Wet sand the finish until the pores fill. Cut back between coats with 400 grit on blocks. I usually do it with 3-4 coats.

2. Paint on the finish without cutting back between coats. Let dry after each coat. After all the pores are filled, use a steel scraper with a burr edge to level the finish. Wet sand in the finish with 400-600 grit to even it out. 1-2 coats will do it.