| # 1 if you live in an area where its cold you need to know the true temp of what your working on or painting , it may feel warm in the garage but the true temp of your paint and the metal can be much different and effect dry times and so on , i use a non contact temp meter ( see pic ) there are better ones out there but i,m still using this one i bought for about 20 bucks . this is one of the many items that is critical to know and correct if its too cold . you can also use a heat lamp or infared lamp to help dry areas if needed . | 
