So far, I have put down a base coat of Cobalt Blue/Phthalo Blue mix right across. I fixed the horizon with a vague idea of coastline. One or two small details were masked out. There is a small buoy next to one leg of the first fort, which will be white eventually. One or two girders or rails facing the light will be pale blue when the mask is removed.

It may not appear so in the photograph but I have washed over the sea, with a dilute Cobalt green, and then rubbed in Raw Sienna at the base of the towers, as the sandbank is visible through the water

With the shadows on the metalwork, I have allowed myself to experiment and used a mix of Cerulean Blue and Ultramarine Violet, a combination I have not used before, but only read about. This makes a pleasant shadow colour, although whether it suits old ironwork is another matter. Some people put shadows in afterwards, and it is a personal choice. I find putting in shadows first gives me a dimensional image to start with, which I find helpful

I couldn’t get near the pale green colour of the paintwork on the towers. I used the Cobalt Green over the original blue wash, and will hope for the best. Time now to work on those delicious rust shades, which I hope will bring a touch of reality

I have absolutely no idea how this painting will end up