I visited the No. 470 around 1960, a few years after her retirement. It was unfenced and anyone could climb on. I cannot recall the exact amount of vandalism it had suffered but I am pretty sure all gauges were broken or missing. However, the most insulting injury was seeing the result of someone defecting in the tender.
The park engine concept of putting these locomotives on a plinth was, in part, based on fuzzy logic. Somewhere along the lines of "Gee, wouldn't it be nice if..." The cheapest execution was to plant it outside. (who has money for a building, right?) The people pushing for this would raise interest and money by telling adults "It's for the kids." Unfortunately, when put in place, usually no money or thought was given to long term care at all. In time, with no champions, they often became eyesores and were removed.
Steam locomotives, for all their size, weight and strength are in reality, fragile mechanisms. They need care and are best stored, inside, at room temperature. Only by doing that will they stay in a perpetual state of good condition.
Honestly, if you had a precious classic car, say a Corvette, a Porsche or a '55 Bel Air or even a DeLorean, would you park it outside all year and expect it to be pristine forever?
Don't misunderstand. I am very grateful for all the park engines and the people who had the vision and expended the effort to do save them. Otherwise we would not have a special group of former park engines, the grand trio of Lima Ladies, the No. 1225, the No. 765 and the No. 4449.
I just wish I or we had a organization to inclose and save all of the park engines we have in the United States.
Once a No. 470 donation website is set up, I will gladly contribute if only just to get her cosmetically restored and inside.