Basically what you're looking for is a good, solid foundation of existing paint that is stable and still strongly bonded to the car. Many times an original factory paint job, even after decades will meet these criteria.
Don't ask friends to help you paint. Basically, you are asking them to give up their day off to save you money. You don't want to be first on the list when your painting buddy hits you up to help him move do you?
Always use a sanding block for flat surfaces. Just your hand behind a thin piece of sand paper can leave grooves and low spots. It's also easier on your hands. For inside curves try wrapping the sand paper around a short section of garden or heater hose. This will help approximate the concave curve and help stay away from sanding through hard edges. On hard edges, like the top ridge of a fender or leading edge of a hood, you need to do this by hand. A sanding block will quickly dig right through the paint on a hard edge and take you down to bare metal. This means primer and more sanding.
Painting in oil has long been a mysterious process the public has believed was relegated to the few and the eccentric. Artists and their lives have always been an unusual breed, but painting a large body of original oil paintings has also been a sure-fire way to drive oneself into immortality. The paintings will always be there, traveling through history, with your name on it! So by this definition it's definitely a noble profession. Think Dali, van Gogh, Picasso, Rembrandt and da Vinci. Each enjoys a lofty reputation for what others might consider crafts. And their reputations only grow bigger over time. What other profession offers that possibility? So who got the last laugh? Well, van Gogh did, of course. He's forever immortalized as one of the greatest humans to have ever lived. Not bad for someone who never made a dime in his own lifetime. But in the age of the Internet and the worldwide marketplace, artists don't have to starve anymore. I'm not starving, and I'm making money doing what I love. I can also work anywhere, whether I'm on vacation or traveling to exotic locales. I love that the most about it. I can do whatever I want and wherever I want, and post a painting for sale from Ibiza, Paris, London.... or Omaha. I wouldn't trade with anyone. And you won't either if you work at it and treat as a way to offer beauty to the world and get paid for it!
Can you feel the rhythm in repeating some color or combination?
If a desired shade is not obtainable in custom-or ready-mixed paints, white paints may be tinted with colors-in-oil. To do this, mix the color-in-oil with a small amount of turpentine or mineral spirits and stir this into the white paint, a little at a time. If a blended color is desired, more than one color may be added, such as a chrome green and chrome yellow pigments to produce a lettuce green shade.
Since the trim is the first to go, the main body of the home will be shortly behind requiring painting. If the trim was recently painted, and a few years later the body is ready for paint, all the trim will need to be covered, commonly referred to as masking off. Masking off expends time, labor and material, which adds to the bottom line cost to the remaining 40%, typically costing an additional 25% for masking trim. Thus costing 25% more after both trim and body portions are painted in separate years.