Garmat Bake Ovens The spray booth systems here at Grubbs are second to none. The computerized environmental system allows us to refinish your vehicle in any kind of weather, from the coldest day to the hotest. Our painters wear air supplied respirators to protect them from harmful paint related products. This also allows them to think clearly and concentrate on giving you the best refinish job possible.     After your vehicle is finished in the spray booth, it is moved to the bake oven. 40 minutes at 140 degrees gives your vehicle the equivalent of a 21-day cure.