I checked the other forum and didn't see what I am about to say. This is not from my own knowledge but I was told once by a GulfStream mechanic the reason why some airplanes have there noses painted black is so that pitting in the nose caused by wind a debris can be seen quicker. But I also asked him about planes with a blended nose cone to match the rest of the paint on the plane? He told me that the manufacture can paint the nose cone to match the rest of the plane but a base color that stands out is painted underneath that top coat. He also told me replacing a nose cone can cost a lot of money but is very important when it comes to the radar system on the aircraft. He even mentioned how pitting in the nose cone, even when they are small can cause interference in the radar system. Maybe some one can back me up on this one, this is what the GulfStream mechanic told me.
Airplanes are only as good as the people who fly&fix them.