Well, that's cleaned up
#17
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I read up a little on the spec data sheet from the actual manufacturer of the materials my firm used. I now actually know what the stuff was (down to the package #). The manufacturer recommends inspection of the top coat every 4 years and they recommend refreshing the top coat depending on how it's holding up to the wear at that time. This involves doing some sanding and then applying the desired top coat material (which in my case is a clear, glossy polyurea formulation). This is why it's good to have a thick top coat (one reason my contractor put down two instead of one layers for me as it turns out), kind of like a good thick clear coat on your paint.
Anyway, it also speaks to the long term cost for a floor like this to keep it looking completely new over the long term. Shove an additional $300 to $400 or so for each of those re-coatings if you expect a lot of wear.
My old floor was not put down with anywhere near the professionalism these new guys used; still I wonder how the floor would have turned out if I had resealed the old floor with a fresh top coat periodically over the years.