Determine the coverage area for each color and estimate the number of gallons you'll need for each. For odd walls with angled ceilings, make your best guess. If you're not comfortable doing this, measure the wall at its highest height and multiply that by its width. Now subtract the lowest height from the highest height, multiply that number by the width, cut that answer in half, and finally subtract that new number from the original height by width. That should give you the wall area.
I managed commercial construction projects for many years, have built and remodeled several properties, and never once have I encountered any of these scams. The tone of this article is deeply troubling. The author seems to be saying that ALL painting contractors are inherently dishonest, and that has not been my experience. The underlying advice here is sound: get it all in writing and cover as many contingencies as possible--so pointing out potential pitfalls like coat coverage is helpful. But do that in the spirit of clear communication of expectations, not with the expectation that the person you are hiring will try to cheat you at every turn. Not every contractor takes outrageous advantage of change orders; not every contractor will sneak past necessary preparation and/or repairs. Contractors of all sorts get a bad rap as it is; reinforcing a stereotype with articles written from this point of view just seems unproductive.
Once you’ve picked the perfect color, you still have to decide on what type of paint you want for the space. Whether you’re looking for an elegant, refined finish or a material that will wipe clean after an impromptu mural from your little one, there are paint types to suite every situation. When it comes to selecting interior paints, several popular options include:
Most interior painting projects will present corners and edges. Corners, trims, splashes and accents will require cutting in — which generally requires the most patience, preparation and skill. There is a lot of debate among painters whether it is better to cut in before or after applying the roller. Solo painters may want to prepare the surfaces first, apply painter’s tape where required and cut in before applying paint to the rollers. Painters working in teams can split cutting in duties in sections while other team members are applying paint with rollers.