Never mind. Soon after posting my question I stumbled upon a website wherein they said "MTB" green was made in the field by mixing yellow and black. I tried it with model enamels and got a dark green which I will use on my 1/72 PT 109. A PT vet told another fellow that the red-brown primer he had used on a PT lower hull looked pretty authentic. Maybe this should be in Modeling Forum, but it isn't, it's here. SvF