After experimenting with alot of acrylic mediums Ive not found any that I really like. They cause a big color shift that can be unpredictable and make the surface of the painting hard and slick so blending wet into dry is much more difficult. It also reduces the pigment load so the overall look of the painting is not of high a quality.

On peices that require alot of blending i just spray with water. Which actally is a solvent so it gets me closer to the pigment. And that makes it hard to tell whether I use oil or acrylics. Just looks like oils cut with turp. However i try not to use water at all either as it causes a color shift.

Acrylics arent about working one perfect layer of paint. Its about layers.