I am thinking of buying this box to convert it into a studio palette. My intention is to keep mixed and unmixed paints away from air. Also, after the present lot of paints I cannot continue with Mark's formula because of our new baby in the house. But I can paint with tube paints straightaway. i can mix a drop of oil if need be. I am used to painting like this as well.
I read in a Watts Atelier material that if you keep a small amount of clove oil inside the closed box palette, it will keep the paint fresh inside. I am gonna test that plus it is easy to keep it in the freezer during summer. This looks like A4 size which is ok with me. If I need more mixing space then I have four additional palettes.