I tried to sketch using various different media, studying the colours initially and then being a bit more free with my interpretation. On page 89 below, I simply stamped with acrylics and some tinted gloss medium, and overlapped some outline shapes to give an idea of transparancy.
On page 95 below,I created more surface texture with pigmented expandable paint and stamped on the back of cellophane to give shine and a bit of layering.
Page 91 uses oil pastels and ink washes while page 93 uses Pantone markers in a very stylised way. The back of the marked page is interesting too where the ink has come through.