I'm not sure about modern weapons as I retired in 82 and there have been alot of changes. Bombs are rough surface no-sheen,however the tailfins could be slick finish and a slight sheen. The older WWII bombs were actually a lighter olive drab I think from just aged finish and the tailfins were slightly lighter with a flat finish. Most missles are semi-gloss white. The missle warheads are usually flat. Nukes tend to have a higher gloss finish as they spend alot of time being cleaned and caressed. This is just my remembrance from my 23 years humping Naval ordnance up and down flightdecks.