I think I probably shoot my 686 plus pro more than any of my other revolvers. The size and barrel length make it just right for me. Fits and points perfect. I am running a Vortex red dot and Hogue finger grove rubber mono grips.
I have and use a lot of Vortex Venom red dot sights. All but one are on Raptor mounts. I also miss not having these wonderful mounts available anymore.
I'm not into percentages and there is different kinds of wear. I have no problem with any gun that has what I consider good honest wear. What I'm not going to give a second look is an abused gun.
Before you send it off to get refinished (which I wouldn't do) at least give it a good polish. I think it will clean up better than you might think. I would also get a correct set of target grips and be done with it.