I worked another couple of hours on this but I'm really struggling. I waited to get a set of professional paints that I thought would be so much better but I'm gradually getting out my older ones. The new ones are too transparent (the pencil marks show through), I'm having trouble mixing the colours I want because they are pigments I'm not used to, and they are so creamy that they can't be layered because the new layer lifts the first one. I'll have to let each layer dry much longer between. So it's back to my usual paints until I have time to do small studies and see if I can use them at all.