I applied the coating outside but you can easily do it in a garage. The oderless mineral sprits had very little detectable fumes but always have ventelation. You could thin the mixture a bit using a consistancy thinner than syrup. You'll get good results by stretching the fabric taught and low. I used a 6" wide squeege (plastic) but if you can find one wider that might work better. It won't cost much to experiment a little to get your technique down before starting on the main piece.
hope this helps...