http://home.att.net/~jbaugher1/p80_3.html has some information (including serial numbers) of the YP-80's that were deployed.
Here is a pic but doesn't give much info. I thought the planes were a light grey color overall but can't confirm.
Some nice pics here but I can't read it so don't know where they are from.
http://www.lietadla.com/lietadla/usa/p-80.htm