For us 'ice neophytes' out there, it's not just a painted concrete floor with water poured over top to cool into ice. (Yes, I was one of those people. I guess you really do learn something new everyday.)
No. I guess I was wrong.
Instead, it's a thin layer of water, cooled & frozen... and then painted, before further layers get added to the ice surface. So when the Zamboni comes tooling by, it's NOT scraping the painted surface off. Nor is the painted surface inches below on the concrete floor.
In fact, as with most things in this world... the truth lies somewhere in the middle.
Apparently this is step one to learning how to be a defenseman - before you can guard the blue line, you need to make friends with the blue line... spend quality time with the blue line...
... while the refs & linesmen 'supervise'?
... do you think they're ever tempted to paint a giant shuffleboard on instead?
... if only it could stay like this forever...