Re: Big Brush
Most hardware stores in this area sell a wooden-handled, bristle brush that is only 1/4 to 3/8" thick. They are available from 3/4" to at least 2", if not more. I use them for gessoing canvas, sky work, blending, even for distant hills or trees. They're only a buck or so, depending on size.
If they lose their shape, I reshape them by cleaning well and clamping them between two small pieces of wood, and letting them dry. You can also use hair conditioner on them to help hold their shape.