Like this, it will actually take quite a while to reach a number that is close enough to the yellow color you've chosen that you can't tell any difference (and mathematically, you will never actually reach an average of 4!)
Either edge of trim is painted with body color, and is where caulking is applied at most 90 degree angles. Painting trim only, cannot feasibly include caulking, as this fails and opens up over time. Most homes need new caulking when painting the exterior, and a close inspection can determine.
You can put it around a room and probably follow immediately with the finish coat. It can be applied with brush or roller.
And, its never been more important to know your colors. Why? Because color is back in a big way! Just look at the vast variety of colors in the department stores.
Proper rolling technique: When rolling paint on the wall, get the roller skin evenly loaded with paint and make a V,N or M pattern on the wall, this is to spread the paint across the entire section you will be rolling, then roll back across the section and even out the paint. To properly "lay off" each section, make a final pass of the section applying light pressure to the roller frame arm end of the roller skin and bringing the nap mark (mark created on the pressure applied side of roller skin) across from the beginning of the section to the end of the section, and just repeat all the way down the wall.The V,N or M pattern, will be determine by how far the paint will spread, a V is for less spreading paint and M is for farther spreading paints. Do not "dry roll", which means trying to roll to much of a section at once with very little paint on the roller. Just as important, do not apply to much, if you find you are applying to much, increase the size of the section you are painting i.e. from a V pattern to an N or a N pattern to a M.
Will the color fade? Now this is a very broad question with various answers. Hair color fading is due to many factors. First of which is, the ability of the hair to hold hair color. We call this porosity. If the hair is overly porous it will have a problem holding hair color. There are ways a stylist can usually alleviate this problem. Once in a while the hair is so damaged it absolutely impossible for the hair to hold color. Your stylist should always have the skills to evaluate these situations, and recommend certain conditioning treatments to bring the hair back to a normal porosity.
Painting the exterior of your house requires a thorough estimation, visualization and preparation. When you have chosen your theme for your rooms and have bought the job materials you need.