All good points above. Surface prep is key as well to a gloss coat. the smoother the underlying surface, the better the gloss coat. Also, I would recommend Mr. Leveling Thinner. Yeah, its $15 for 400ml, but it is well worth it. It has an additive that slows drying time and assists in leveling your paint. It thins lacquers, Tamiya paints, enamels, and of course Gunze, and works awesomely. To get a really fool proof gloss coat, I learned this little trick from a FB group that works exceptionally well. Get some Tamiya X-22 clear and thin it with Mr. Leveling Thinner and apply. When your done applying this mixture, load straight Mr. Leveling Thinner into your airbrush and apply a wet coat of straight MLT. 3-5 minutes later, you have a gorgeous gloss coat, even if you didn't apply the X-22 evenly. Works awesome.