The finish will not 'over-cure', but it does heat up while curing so if like in my enclosed setup, the lights also create heat, you can have a heat buildup that can cause the finish to lift as it cools down afterwards. To avoid this happening, I cure for a minute, then pull it out for 2 minutes then put in for another minute, etc for a total of 3 minutes of cure time. I need to cut vents in the tunnel for heat release. When doing a full cue, like a wrapless, you should use 4ft lamps to ensure a full cure for the whole length.
Dave