Hi, Say08. I'm totally new at this so take my answer for what it's worth (not much), but I've followed the tech manual which says to wait 30-60 minutes prior to sanding. It doesn't give a temp for the 2K that I remember, but I keep my garage at about 68F and I wait at least 60 minutes prior to sanding. I haven't any any problems and it hasn't appeared that the paint was wet or otherwise not set up fully.
I've done as many as 4 coats (5 minutes between coats, again, per the tech manual) and have had the same experience.