San Francisco secondary armament

Usually the gun mounts are painted to match the surrounding areas. The 20mm gun is like a .50 cal in that the receiver and barrel are bare gun metal, but the 40mm is a mix of painted and bare metal.

Based on the Measure 21 scheme, I presume you are building the 1942 kit if USS San Francisco as at Guadalcanal?

Here is a link to her battle damage report, which includes photos of the damage. At that time, she had 1.1" quad gun mounts, not 40mm. There is a photo there of a damaged one. None are color though.

http://www.researcheratlarge.com/Ships/CA38/GuadalcanalDamageRpt.html

Now here are some B&W photos of teh same types of gun mounts on USS Pennsylvania in 1942 in Measure  21

1.1" Quads had a water cooled jacket over the barrels- they appear to be painted as does the rest of the guns, with the exception of the muzzle portion of the barrel in bare steel

and the 20mm mounts- everything except the gun itself appears painted to match the surrounding area

Thanks, guys.

Heres a photo I have from some review of the kit. I have no idea when it was taken. It looks like CA-38, but its not measure 21. However theres a couple of AA cannons in the picture if that helps.