Primer:  While technically not paint or a finish, the use of primer is crucial in interior painting. Failing to use primer on a porous surface, such as wood or concrete, can lead to imperfect paint coatings that could end up peeling away from the walls. Primer is also a must if covering up a darker color, as it will take fewer layers to cover the old paint.
You have to start with a perfectly smooth surface to end up with perfectly painted walls or woodwork. One pro tells PM that Sander would be a more fitting job title than Painter since he spends so much time pushing sandpaper. Sanding levels outs spackle or joint-compound patches and flattens ridges around nail holes. Sanding also removes burrs and rough spots in your trim.
Unlike sites which blend pricing from dissimilar jobs, homewyse estimates are based on the Unit Cost method. This method uses job specific detail for superior pricing accuracy and transparency - and has become an industry standard through publications and guidance of leading trade associations, including: PHCCA, the NKBA, the NECA, the AIA, and the ASPE.
As a former professional painter, something that drives me crazy is when I see painters cut in around wall plates. First of all, the amount of time that it takes to cut in is usually much longer than the amount of time that it takes to simply remove the wall plate. Secondly it does not look nearly as clean as it does when the wall plate is removed and thirdly it can invariably leave paint on the wall plate itself which also looks sloppy. Make sure the painter takes them off and then reinstalls them. It's less time.
Most pros don't bother cleaning brushes and rollers if they are going to use them the next day on the same job. "Latex paint dries slowly in cold temperatures," says Maceyunas. For two-day jobs, he wraps the rollers and brushes in plastic grocery bags and sticks them in the refrigerator. "Just allow the roller to return to room temperature before reusing it," he says. Roller covers are almost impossible to clean thoroughly. Most pros buy new covers for each job.

Home Interior Painters