I wouldnt be able to bring myself to use an old bike for yard art, I try to use old mtn bikes for yard art. I just strip them down to the basic frame and parts and spray bomb them all one color. Ive had people stop and check mine out then realize it isnt anywhere as old as they thought when they drove by.
It's a '80's Murray Westport and the frame is tweaked, the stem is stuck in the head tube, and the pedals are frozen in the crank otherwise it's a great bike!
I did ride it (creaky bearings and all) and it actually rode pretty good.