I cleaned all of the interios with Mothers interior cleaner/lotion. I guess I spritzed the glass of the speedo inavertantly and didn't wipe it off . Maybe it is the heat down here in Fla, but now it is stained in a spotted pattern every time I look down at my speed. Is the plastic face (might be called the "Bezel") hard to remove? I don't know if I could use the same technique on it as getting the glaze off of headlights? Or I might just buy a cheap speedo on Ebay and switch the face? If I go junkyarding, are the speedo's on Concorde's and intrepids the same shape and the glass/plastic bezels interchangeble with 300M's and 300 Specials? The guages are fine, I just need a clear bezel. Hope I'm using that word right.
You can put in the later Concorde clusters - they are black with chrome rings. Concorde lens is different - can't use that in the M. Intrepids will fit. Specials and non-Specials are interchangeable.
The parts pdf's call that part the "mask [black part that spaces the lens off the cluster] and lens [clear part]". There is a separate part that is called the bezel - that's the black oval piece that frames the lens against the dash.
*Easily* polished with a good plastic polish. More easily done with it removed - remove cluster, then remove lens from cluster. Or just remove bezel and polish with cluster and lens in the car. Cluster removal How-To here: http://300mclub.org/forums/viewtopic.php?f=54&t=18918
And you might notice what you think is a very small crack extending radially from the odometer reset rod hole. It's not a crack - its a mark molded into the surface of the lens (maybe to guide a computerized drilling operation during manufacturing?). Sand and polish that out if you want - can't remember if it's on the front or rear surface - maybe both, but no one will ever notice it unless they are polishing the lens and inspecting it closely. Figured I'd mention it in case you did happen to notice it. A couple of people have noticed it before and thought they had a cracked lens. Thought I'd save you the trouble of worrying.