How often should I be having to refill my brush with paint? It feels like I can hardly paint a whole marine leg without running out of paint on the brush. Even though I've painted a fair bit over a few years, I still find myself struggling with the basics like this and thinning to the correct consistency. It makes base coating a nightmare and slows me down immensely since I'm having to paint 3-4 coats of most paints instead of just 2.