Ice Resin

I haven't worked with Resin since the summer.  I had a lot of success when the weather was warm and knowing that I'd be less successful once winter set in.  I've been asked to make several necklaces for Christmas gifts (and figured I'd make a few of my own while I was at it) so I had to figure out how to make this work in our chilly Colorado winter home! 
My first pour yesterday left some strange circular patches on the face of the resin.  It seemed that the last "top off" of resin was not warm enough and pooled on top of the other resin.  It was still early in the resin's working time so I don't think that had much to do with it?   Today I warmed the room with a space heater, warmed the resin AND placed the pendant bodies on my electric griddle that I use to dry my PMC clay.  Keeping the metal pendant bodies gently warmed seemed to do the trick!