Hello!
My take on that was to put on several light coats of paint with light wet sanding with fine grit sandpaper between the coats. I let each coat dry about 48 hours before sanding, and you have to be careful not to sand through, this is especially critical on any edges or raised detail. Once you have good colour coverage it might be good to switch to clear coat, I had a good experience with the one from Gunze. I have a feeling it dries faster so you dont have to wait so long before sanding. After the final coat let it sit for afew days and then you can polish it with an automotive polishing paste and a soft cloth or paper tissue.
Hope this helps, good luck with your build
Pawel