Thanks WORF.
I had a quick look at Renton as well but only saw an all white B737-700 (PH-XRV), a Futura B737 (EC-JGE) and 2 bare metal B737's which had the same rudder colours. i.e. red with a white flash across it. Didn't recognise those colours so couldn't say which airline they were for.
My main reason for visiting was to look at the Everett plant and look around Kenmore's Beaver and Otter float-planes.
airsmiles