No Campy is building new, so prep is based by pouring a small amount of water onto the concrete floor. If the surface soaks up the water somewhat like a blotter, it is porous enough for coating. This is what I expect on new concrete, but if water does not absorb into the concrete, it needs to be etched & washed down with a surface prep solution, it just gets brushed in with broom set for 10 minutes and rinse well. Follow labels some are different.
If this step is needed add another hour or so, let dry overnight be sure it's dry the next day.
On difficulty scale of 1-10 it's a 2
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