We've been in the process of refinishing our pool since end of September. We're finally ready to replaster (with River Rok) but I'm concerned about the weather. The forecast is for a high of 45 on the day (low of 31 for the following two days) here in Connecticut. I read the installation guidelines which say "All materials and effected areas should remain above 50 degrees 24 hrs prior and 72 hrs after replacement". Should I worry? Thanks for your wisdom.