Unless you are an expert with spray equipment, the best way to apply paint is the "roll and tip" method. One person rolls a thin coat of paint. The second person follows the roller with a brush. The brush removes the "stipple" created by the roller and produces the smooth finish.
Rolling paint is the best way to get the desired great gloss thin finish coat. Use a solvent resistant (phenolic core), high density/closed cell Foam Roller
with a 1/8" nap.
This will minimize the formation of bubbles in the surface that can occur with mohair and large cell foam rollers. A thick coat with a regular roller will run or sag and may not adhere as well to the substrate.
The next day wet sand the entire area with extra fine sandpaper and lots of water. Then do a thorough water wash and a full wipe down with a tac cloth, rotating and throwing out the rags every couple of feet.
Then paint it again.