Nice build, Glenn
that is the aircraft I thought of when I saw the posted link to NJ-25,,,,,,,,,your NJ-23 is in an Airlife book called "Fight's on!", by Tim Laming in 1996. I only mention it because if you can find it, it was done in the old Osprey style of many color photographs, in this case, all Agressor aircraft from all over the world.
as for the colors,,,,,,,,,I chose not to take any liberties at all with them,,,,,,,,,I matched all but 4 colors that I will need to an antique 595A, for my entire decal collection,,,,,,,those 4 colors I will have to mix, because no model paint company makes them,,,,,but, I don't have to mix the other 146 colors
my variety comes in by showing the markings of a couple of hundred different squadrons and deployments, and the aircraft sub-types,,,,,,so, I will just use "spec" colors, and let other modelers do the scale effect and weathering thing
with your own collection, and even for contests, remember, this is all about having fun and "doing it our way",,,,,,even contests aren't supposed to drill down to "did he get the gray withing 4 hundredths in the Munsell book?",,,,so, if that ain't your thing,,,,,,,don't feel obligated to do it
Rex