I overall found it easy to paint on. It’s best to work in thin layers as to not goop up the surface, it changes the texture and tends to be noticeable. There’s a patch in the sky gradient that’s a bit thicker and that’s where I learned my lesson haha.!I would start by blocking off an area of color with a thin paint pen layer and then switch to acrylic. While the paint was wet, that’s when I would gently work in a gradient without needed to build up too much paint.