Guess we will find out in a couple of days when it gets cold again.
The snow is going to act as an insulator for the ice so it should in theory keep that ice a bit colder than the exposed ice. It's not a bad idea. I've seen others who paint their ice cover up the painted sections with snow when it's warm out to protect the paint.
My only suggestion is to clear that snow as soon as it starts getting cold again. What are your night temperatures like?
Making Backyard Rinks from 1999-2015
Twitter: @kevmac_5 or @macisaac_odr
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