Haze Gray and Deck Gray

On my 1/96 scale models, I use Aggressor Grey for the vertical surfaces, and Gunship Grey for the decks.   I agree that the Gunship Grey fades dramatically in service, so you can fade it by lightening it with white if you are portraying a more weathered vessel.  Adding white will also help with the scale effect.

Testors makes Haze Gray in their latest releases of their Model Master acrylic and enamel paint lines. But no Deck Gray. If you think Gunship Gray is too dark, I suggest AMC ( Air Mobility Command ) Gray, it is darker than modern FS Neutral Gray and lighter than Gunship Gray.  It is the current color used overall on USAF transport aircraft such as the C-130 and C-17. Testors also makes that color.