I saw this really beautiful painting in my local museum that had real thick application of paint impasto style. I decided to give it a shot. I bought all these different palette knives to use etc... I was going to use the paint straight from the tub when I realized artists probably use a medium to extend the paint... I tried doing some research online, but there really isn't a whole lot of information on the subject... anyways, i bought wax by gamblin and tried that... but it really mats the painting...and there is this coat of wax on my painting... not exactly the look i wanted... anyone know what a really good impasto medium I should use?