I don't know how thick the brass coating on it is, but it is thick. It ain't like a gold leaf coating or none of that, holds up good, looks good for a long time.
The one thing about it though, is that it is so shiny, that most people tend to take care of it more than some of their other guns, it's a pride thing.
Mine has been out in the rabbit brush many times, and has no eyesores to speak of.