Hey Dan, Paul here, I have a couple of Marin Muirwoods frames from 92/93 and a couple of others from later years, they are all good frames, let us know what colours there are under the gold . . taking the protective tape off of the rear stay may help too.
I think Marins of this area are incredibly under rated, a good solid nice riding frame with some nice welding for the most part, with a good middle of the road componentry base they are a good get around with a good bit of longevity to them.