I did this as a demonstration study for my students, one of whom had asked me about the technique of glazing. Essentially, the entire composition is worked out and painted tonally in grey before being tinted with transparent 'glazes' of oil colour. It's a very safe way of painting because any drawing or tonal errors can be corrected before colouring. All that glazing and no firing -it's even simpler than ceramics. Well done Daddy.