SSWR SEMIAHMOO PAINT THE COAST DAY 1 – VID 1 OF 2 By Tony O'Regan | November 5, 2017 0 Comment Stage One is to create a “grisaille” underpainting. Use a grayed sown blue. Don’t get too dark. It is essentially a value study, concentrating on identifying 3 to 4 tonal values in the design. This applies to both watercolor and acrylic.