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!)
Cheaper then doing it yourself. Some would argue that if you're going to all the trouble to fully prep the car yourself, then why not just shoot the paint as well? Why get a shop involved? The answer is simply that you'll get a better job and for less money. Some would argue with this, but the fact is that if you've never sprayed a car before then your first car will have a steep, and expensive learning curve. Laying down an even, consistent coat of paint takes considerable practice. Also, paint and equipment is not cheap. You'll need to buy primer, color coat, clear coat, reducers & catalysts. None of these are inexpensive and you can easily spend as much in paint materials alone as the cheapest paint job at Maaco or similar shop.
Some manufacturers recommend their vinyl paints for interior as well as exterior use; others say no, not so good. There are vinyls made specifically for interiors.
If red is the color of fire and yellow is the color of sun, then orange color, which originates from the blend of these two colors, combines both warmth and light in it. Light muted orange accent will give your interior cosiness and warmth, especially in the room with windows facing north. Bright orange color in the interior on the other hand is more of a claim for originality.
If new caulk is applied, main body portion needs to be touched up, and most of the time new paint will not match aged paint even using exactly the same paint out of the same paint can, as sheen difference will come into play.
Satin paints offer a good combination of easy-clean and moderate sheen. These paints go a step above eggshell in scrubbing ability. They perform and look great in just about any room.
Reasons to Use Primer with Paint. Primer plays 2 important roles in painting projects. Firstly, if you are painting a wall that has never been painted (with water-based paint) before, primer will allow your new paint to stick (or "mechanically bond") to the surface. Since primer is typically not necessary if the wall has previously been painted, many people skip this step. Unfortunately, doing so negates its 2nd (often, more valuable) role in color coverage.