Ok after a fair bit of stuffing around determining what needed to be done in and around the radiator intakes i got the stuff together and rechecked what could be seen and what wouldn't...... determined that most would not be seen and what could, would not need to be detailed too much.
So I painted the intake areas in the Curtiss green the radiators in Black and then used the Silver pencil to highlight the screen details to an acceptable level, for the most part you can't see much anyway once closed in by the fuselage halves....