I was not satisfied with the first result so tried it again two times, this one was the best in my opinion, on stretched canvas 30x40cm winton oil. Returned to basic layer of linseed oil combined with background colour. No oil or using turpentine did not work for me. Added a little bit of yellow in the main wave and added some grassy things to the rock on the beach. Still like the painting and the way Bob is setting it up.