My garage was probably about 70 degrees the first time I used it, took about 2 days before tacky. I have a pellet stove in the garage so I fired it up the next time. I waited until the garage and rod were up to about 85-90, this also removed any moisture in the garage. This time it was tacky in about 8 hours and completely set up over night. The only problem was, the garage is in the basement under our master bedroom, wifey said it was too darn hot that night.
I'm thinking if you wait an hour or so, then either hit it with a heat lamp, or one of them there ceramic heaters blowing across the blank, you'll cut your drying time in half.