The outcome of this unsatisfactory experience, and our subsequent discussion, is that my client plans to offer our, (his and my), services to the group the next time they plan a painting class. He has decided this because he wants to learn something the next time, and he wants his fellow class members to learn too.
He wants them to learn about colour, about mixing paint and how to use brushes, palette-knives, sponges and stamps to apply paint, just as he has done from me in the past. Not only does he wish that these practical things are taught but also how to form shapes and make marks that when put together will allow them to express whatever ideas they wish to in the images that they produce.
We will see if we get invited. I am glad that I am included in his team.