The trouble with this technique is that modern paint and stain begins to seal itself almost instantly when applied to a dry wall. In fact, when it is warm outside, or when a wall is exposed to direct sunlight, paint and stain can be dry to the touch within 60 seconds! This doesn’t leave enough time for the painter to change tools and still push the paint and stain into those vital pores and grooves in the various surfaces to be painted or stained. The painter knows this and although many companies promise that they will backbrush, they know it’s a waste of time so they skip it altogether. Spraying is cheaper than brushing and rolling, that is for sure. However if that is the route you choose, you’ll have to have it done again twice as fast! In fact, we refuse to use our paint sprayer on exterior work even when someone asks us to because we don’t want our good name to become synonymous with cheap results.