Model Forum / General / Models / April 2009

Yellow ZC was a first protective coat, Green ZG was a second protective
coat, different color was a proof of the second coat. Sometimes second
coat wasn't applied.

IIRC except Curtisss built P-47G's, YZC has no place in cockpits. Other
interior surfaces, yes, but later in WW2, esp. USAAF, some int. surfaces
were left in bare metal.

It depends on plane type and manufacturer.

On some later (fifties and up) a/c you could find both in use at the
same level.  Also, ZnCr has different tones and weathers at diff-
erent rates depending on who manufactured the lot at what time.
At Minot AFB I have photographed B-52's with gloss light grey,
gloss white, green ZnCr of multiple shades and yellow ZnCr of diff-
erent shades all on the same a/c.  What the other post said is
correct.  But if you're doing a very used a/c and don't have photos
of it in a specific way, you can almost make your choice as to
what to use.

Hope that this helps!