Prepare Surfaces and Spot Prime

i did get a lot of people asking me well why am i spot priming it why don't i just prime the whole house well um priming the whole entire house is going to take 10 times more material than it was spot priming and would have took about three times longer to prime the whole entire house and it didn't need to be primed so the sprout priming was a lot faster and more efficient you know why didn't i spray it um when i was priming it on the back brushing or back rolling is enhancing adhesion and penetration so i always like to brush or roll my primer at an unusual situation with on these