Sleepy, I have to agree about painting roofs old roofs. I have done a couple that the owners insisted on painting the roofs of their coaches. They looked clean and new .... but nothing looks better than a new membrane lying flat on the roof. For the amount of use that they gave their coaches, it was worth it to them, as they did not have any problems (I guess I did a good prep job).
Personally I am still at a cross roads with TPO. When I was working (ya I know dinosaurs were still walking the earth) TPO was having some difficulties with their initial offerings. I have had good luck with EPDM and like they say if it ain't broke don't fix it. But that is my personal preference. I will ask the estimators about their thoughts on the newer materials when I take it to them.
I would like to thank travelnutz for the PM and enblethem for the pricing information. Sleepy and Silversand for the TPO information, as I will look into it. Finally Gitpicker2009, thanks for the return to memory lane on the coating jobs that I did back in the 90's.
Damn I like this board.