How To Trace Well Even When It’s Hot

Common sense answers:

Tracing when it’s hot is far more difficult than in the cold because your paint is always drying out. So the first thing is of course, you look around for common sense answers to this problem.

Of course:

  1. You moisten your lump from time to time.
  2. You also keep it covered.
  3. And you do other things like you might use rubber stickers, or get a cooler light, use air-conditioning, or even remove your palette from the light-box altogether.

Is there something I add to our paint to slow down the speed with which it dries?