I am having issues with some of my paint becoming thin on the pallet. For instance, when I create a mountain and then take the brush to pull out the paint or diffuse, sometimes I get runny color. I don't think it is the result of too much liquid white, because I don't see the color changing value.
What I think may be happening is that my brush is not getting dry enough from the cleaning procedure. I am at a loss as to why not, though, because follow Bob's procedure: shake off and then really beat the brush on a brush-beater rack. I beat the brush much longer than Bob does on the show. The brush seems to be a little bit moist, and sometimes I do use a paper towel.
I am using Mona Lisa odorless thinner (I use all BRI paint). Does it matter that I'm not using the BRI thinner? What am I missing?
This is probably the thing that is causing me not to progress in my painting because the paint doesn't hold its firmness once it hits the canvas.
Thanks for any tips.