Boy-o-boy…Andre!, these subtle refinements in fuselage detail lift this piece to whole altogether hyper-stratospheric level, heh…apologies for the over-the-top
hyperbole, but then again very much deserved to be honest 
Anyways I’ve actually seen these day-to-day operational wear-n-tear incurred overtime up close due to my previous military experience usually as you’ve defined around the engine cowlings & such.
As an aside my Regiment [Armoured Cav Reconnaissance] worked with the rotary air wing element of the parent Brigade when mission tasked during offensive operations/exercises’ in desert environments circa: 1986 - 90.
The assets I was most familiar with, ranged from the light Recon Bell OH-58 “Kiowa” through to the heavy lift Boeing CH-47D/F “Chinook” and not forgetting the Sikorsky UH-60 “Black Hawk”.
…so again just truly inspiring work - U-Dah-Man extraordinaire 
Cheers 






