Prepping a house costs anywhere from $0.50 to $2.50 per square foot. This is almost always included in the total project price. However, the DIYer might negotiate some discounts for completing this work on their own. Be warned, proper prep is key to the quality and durability of the finish. If you do this work yourself, the contractor might no guarantee to finished product. Home Painters Aurora CO
Paint sheen is determined by the ratio of resins and binders to pigment levels in the paint. Paints with a high level of resins/binders create a high-sheen, shiny surface, while those where the pigment levels are high, create a less reflective surface. Generally speaking, glossier paints are more durable, while flatter paints are less resilient but cover better.  Home Painter Aurora Colorado