Keith, do you use the oil paint for indoors? I was asked once to paint an outdoor fence and was told by a professional mural painter that I had to buy special outdoor paint. All the prepping and special paints cost money plus there is a learning curve to adapt to the handling of these paints. I can`t remember the name of them. I decided not to pursue it for those reasons. Do you use very large brushes also? It seems like everything has to become larger than life, equipment, tools, mediums, rags. I got to hand it to you for tackling large scale paint jobs!