I don't know exactly what you're referring to, but I'll bite anyway.
I assume you mean the coating that ruger is using on their guns.
I don't know if it's the same, but I had a 77/22VHZ finished in target grey. (Ruger 22 hornet bolt action rifle.)
It was beautiful.
I would shoot it off the deck of my old house at targets 50 yards away.
When I went to check them I'd rest the gun's barrel against the deck rail, sitting vertically.
The gentle contact with the soft deck lumber marred the snot out of the barrel.
I only did that when I sighted it in, and only until I noticed it.
It shot HORRIBLY, and I didn't know it was defective at the time, so I traded it away rather than having it worked on under warranty.
The marring on the barrel was very visable, and I took a hit on that, too.
I don't know if it was representative of the breed, but my experience with target grey has been bad.
I'd assume that it's a fragile coating for now.
It looks beautiful in the showroom.