I've getting ready to paint the hood and fender on my son's Deville, but with family emergency it has not gotten done. It's now in the low 60's in southeastern WA state. I'm going to put up plastic to make my shop area smaller and easier to heat. The only heat source I have is a torpedo heater. Will this work to heat the area up to temp and then shut it off spray the primer, heat again up to temp and then spray the paint? Or can I leave the heater run while priming/painting and ventilate the area at the same time?