Not sure if this will link correctly, but my local rink (only rink, 67 miles away) is resurfacing and repainting
the last few days and have been putting up pictures of the process. They're using sand as the base layer which I wouldn't have guessed. I assumed
the base was just smoothe concrete with ice on top. Kirk S. Nevin Arena used to melt off their ice and do roller hockey in the summer so I assumed that's how it was done. This rink here is basically laying down a sand bed, freezing it, putting three coats of paint on top, and then ice on top of that. Pretty neat, but they're already a week overdue and had to move some adult league games.
I helped with that at the rink I used to play at (Hagerstown MD) its an extremely tedious process. The boards & doors have to be realigned because the ice gets under and heaves them up & out. Then repairs to coolant tubing, level the sand, build up layers of ice, paint white, more ice, lay out the lines, circles, goal creases, stencils for sponsors & huge bulldog at center ice, hand paint everything, then build up more ice one layer at a time.