Originally Posted by straptrams91
...there is no protective layer on the gun, it will get dirty extremely fast and be very hard to clean, it will pit from raw aluminum exposure to the air/paint/oil/sweat...
Eh, lasering a marker removes this protective layer and they seem to hold up very well.
As long as the internals are anno'd so the orings seal and there's no wear, the marker can be raw. However, as you mentioned, it will require a rub down with some Isoprophyl alcohol from time to time to clean it.
If the Dark pictured above is like the Edge I referred to, it has anno on it. 'sandblast' is most likely just a name hung onto the finish because it's a clear heavy dust look resembling raw aluminum.