I've had this problem on a couple of rods I've built and I'm thinking it was caused by humidity more than cold. Every time it has happened, It was real humid out and i work in my basement...not the driest of locales. I've found that if it's to cold, the Flex Coat won't dry at all, or it will dry very lumpy. The bad part about this is that I had to completely remove the wraps and re-do them. Hang in there and let us know how you make out.

Ken