Looks like my GN is going in for paint on Friday. I know my paint guy will be using PPG paint. Is there any paint code specifically to use? I know nothing about the painting process. He also mentioned he would use a whole gallon of clear when I said I would like it to look 3 feet deep. Is that a lot of clear to put on? Any draw backs to a lot of layers of clear. Thanks in advance. By the way I have seen some of his paint jobs.Beautifull!!!