The protective layer on Stainless Steel comes not just from lots of polishing, but also from an acid treatment
it is a citric solution that the statue should be washed down with once a year to remove any residual crud that might build up from sticky hands and whatever is in the water evaporating off.
All of this is well worth the effort, in the evening light you can really see the reflective glow of the shiny surfaces contrasting with the shadows.

