Be careful that you don't let your lacquer get too cold or spray when the air is too damp. You will get a PERMANENT foggy effect inside the lacquer called blushing. It is tiny water vapor trapped in the lacquer because the lacquer cooled too quickly in damp air. Lac. cools some because it dries so rapidly,allowing water vapor to condense in it. Only removable by removing the lacquer.
I'd avoid real cool temps too. The lacquer might craze or get seams in it(on a guitar that has binding,or possibly on the seam of the fingerboard) when things warm back up. I can't be certain of this because I don't spray when it is real cold,but I think it is a possibility. The blushing I HAVE had happen,though,when I was young and inexperienced.
About the OZ polish: How VAIN can these politicians get? But,it has been around for many years before Bayner(sp?) came into office. Good stuff to stay away from.
By the way,I have been getting perfect results with a $35.00 Chinese DeVilbiss copy spray gun for many years now. I had a Binks years ago,but it got stolen. My el cheap gun atomizes perfectly for beautiful sunburst finishes.
Here's an "ice tea" sunburst done with my cheap gun.
So,if you don't like to take chances when changing from a solid color to a clear,just buy 2 guns and only use them for 1 or the other. I can save a lot of pain in the neck when you get a little speck of unwanted color in a clear or tinted finish later. I don't know why these pictures are tipped over.