Don't you just love "aha" moments!
I just had one when I saw this glamorous painted-black stairwell. I've been mulling over what to do with mine for so long...
It is super expensive to have them polished, and I think it would be a waste of time and money; the traffic up and down them would soon wear the polish off, but paint, paint is a different matter, especially glossy black paint. Paired with one of these wallpapers and a '70s-style light fitting, like the one below. Glamourama!
Nueveo Estilo, via The Glamourai.