Robert

Where have you been advertising?  I tried a new site featured in the Times. It's just starting up and it's free at the moment. I haven't had any takers yet but I advertised my house and the 'project' has had 800 'hits' so far. Why not advertise (e.g. Help with landscape painting/ produce your own masterpiece with our help) as a project? It won't cost a penny and even if you get no sales you will be able to measure the respose to different approaches and improve your other ads.