Welcome and good luck with restoring the car! Always nice to see Sierras being rescued!

BTW, are you sure it's mercury grey? I didn't think they did mercury grey on the facelifted model (post 1990). But polaris grey and mercury grey always look a bit alike in my opinion. I still think mercuy grey is the nicest colour on a sapph, but perhaps that's only because my first sapph was mercury grey.