Tashmoo,
You may want to spend your time doing demo and grinding work until about March or some mild weekend (yea right). Get everything ready now. I have my 23 in a garage with 2 space heaters going (big garage). I have done layup in the past on milder days but like Island says the cure basically stops when the temp drops. This can really slow you down.
I have made nice gadgets like heated glue boxes where I store my stuff so it can be pumped out and so it mixes warm. You can use lights on small jobs to bring up surface temps. Either way you just fight the cold. Also a big thing seems to be you always fight the moisture in the slab of your unheated garage. For me it seems hard to make it hot and dry even on milder days.
Enjoy your winter and put the extra time into prep
