As you scrape, you may find that the wood has turned gray or black in some areas. Check for rot by probing these areas with a nail. Spots that are discolored but firm are simply weathered. Weathered wood doesn’t hold paint very well, so sand away the gray surface. If you find soft areas, you’ve got rot. Small, shallow soft spots can be dug out and repaired with a two-part filler such as Minwax High Performance Wood Filler. But when rot is deep and widespread, it’s best to replace the entire piece of wood. 
simple Wall Painting Designs

I did go with the highest bidder and it did not matter. They did a shoddy job and threatened to take me to court when I pointed out mistakes that they made based on their work standards stated on the quote. I have not paid them yet, just filed a complaint with the BBB. No money down asked, no contract signed. The boss stated I have to high of expectations just because I live in a 121 year old house!

If the point of hiring a well established, experienced, reputable painting contractor is to secure the professionalism and trust suggested to be inherent with that choice, then I would EXPECT that professionalism and experience to include the ability to make the proper and correct calculations for labor and materials for a fixed price quote, and there should be NO reason for the contractor to put the cost burden of their miscalculation on the consumer. http://www.youtube.com/watch?feature=player_embedded&v=b6_WEt9k_Hw

We had a bad experience with an interior painter years ago, with the crux of the problem being him overcharging us at the end for "extra work" he didn't anticipate. One thing I'd strongly recommend is making sure it's in the contract that any additional work or growth work is estimated and communicated to the owner as soon as it is identified, otherwise the owner is not liable to pay it at the end.
Skip the do-overs and pick the perfect paint color the first time around. No matter what space, shade, or aesthetic you're looking for, we've got ideas. And then we've got some more ideas. We compiled all our best paint color advice in one place to make it even easier. By the time you're done with this story, you'll have your paint woes all solved.
^{This article with comments was terrific - it was so informative. I found the advice useful. It addressed specifics like the condition of the dry wall surfaces, any additional repairs such. pin holes, chalking, smoothing of wall surfaces, absorption of paint and number of coats that may be needed. It should also include insurance coverage, and reflect the clean-up afterwards. Having a written contract with the company's letterhead is a must.}
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Your business is your livelihood, and it should look its best. In an age where competition is stiff and business is hard to come by, trust our local painters and renovation experts to complete your business painting or remodel job quickly and efficiently with minimal disruption to your patrons, clients, and guests. Keep up with modern style in your business with our professional finishes and accents, and create a completely one of a kind look for your company’s space that your guests can’t wait to come back to. https://m.youtube.com/watch?v=b6_WEt9k_Hw
The national average cost for an interior painter ranges between $450 and $900. Interior painters can tackle everything from complete color makeovers in each of your rooms to touching up an accent wall to painting pieces of furniture. The square footage and complexity of the project, along with the materials needed, are the main factors that will affect cost. Other factors include whether you supply the paint yourself or want the painter to do so, whether you move the furniture and do the prep work or ask them to do it, and whether any repair work is needed on the walls. Painting the ceiling and the trim will also have an effect on cost. The type of paint you choose can also raise or lower your house painting cost. A gallon of paint may range from $20 to over $100, depending on quality and brand. Ask your painter if they charge per hour or per square foot, and how much you can save by doing prep work (moving furniture, etc.) yourself.
I used to work at Sherwin Williams. The best thing to do is specify that you will purchase your own paint. If the painter objects strenuously, he was plaanning on making money in the ways this article outlines. You might pay a few dollars more for paint, but you will have control of the quality of what goes on your walls. Never skimp on paint quality.

The walls must be properly cleaned prior to applying primer or paint. This involves using a mixture of soap and water. Nail holes, chips, cracks or other small imperfections should be filled in and evened with plaster and allowed to dry before the entire surface is lightly sanded down and wiped again. Once the wall is clean and dry, you should apply painter’s tape over surfaces you do not want painted. Be sure not to overlook ceiling corners and edges, baseboards and trims and moldings. https://www.youtube.com/watch?v=b6_WEt9k_Hw&app=desktop

Not only careful communication is essential, but we would greatly recommend, when you pick out your type and brand of paint that you go and pay for it, with the contractor's discount, which is given by Sherwin-Williams and most paint companies. Then you will know how much paint you purchased and the coverage. If it is possible, inspect the work of the painter daily.
Painting contractors must also carry out administrative and marketing duties. They prepare final accounts for customers based on the original estimates and any additional work. They analyze the cost of the job compared with the estimate to calculate their profit. They market their business through activities such as setting up websites, asking customers for references or contacting property maintenance companies with details of their services.
This all comes down to the rules.....1. references....does the contractor have them??? I ALWAYS furnish all my prospective customers them....no excuses...2. insurance....again, I always furnish proof....3. Read the proposal carefully...I ALWAYS list materials down to tape used, the brand, the grit of sandpaper, the manufacturer, etc....its INEXCUSABLE to not list all of these items....I am a member of the PDCA, the Painting and Decorating Contractors of America, the foremost authority in the coatings industry and they also approve of what I listed....if you do not follow these guidelines, you will NOT get a job reflective of "professional". Look for the PDCA where any painting contractors are, if they are not a member, RUN!
Dave, you said it best! Every pro painting contractor truly worth their salt would and should cut and paste exactly what you say here about where customary and legitimate practices and expectations should be in regards to what customers should expect from contractors and how contractors should professionally deal with their customers. By the way, Dave, if you work in the Atlanta area, I would like to hire you! Thank you for your valuable advice!
When selecting a color scheme for the home’s exterior homeowners can choose color options that will correct flaws that they may feel exist with their home and property.  Some examples include utilizing two shades of a single color to make a home appear appropriately sized when the home may be too large or too tall.  To accomplish this effect individuals will want to place the darker tone on the upper level of the home’s exterior.  Smaller windows can appear more proportionately sized by trimming them in a lighter tone of paint.  Darker colors make a space or feature appear smaller.  The same effect can be obtained for homes positioned further away from a curb.  By using lighter tones the home will not feel camouflaged.