You scuff up existing paint for two reasons. First, you want to get rid of any oil, grease or dirt trapped in the top layer of paint. This is the stuff that cleaners and degreasers can't get off. The second reason to scuff is to set up a physical bond for the new primer and paint to adhere to. You want to give the old paint some tooth so the new sticks better.
The reasoning here is simple. Every color in the visible spectrum can be assigned a number based on a luminosity scale (a scale from light to dark) from 0 to 9 where white is 0 and black is 9. Now suppose that the brown you are trying to cover has a score of 8, and the yellow paint you want to apply has a 4.
Jaipur School: Gods and goddesses, kings and durbars are very attractively painted on hand made papers by the artists.
The leading brands now flag up paints with lower VOCs and produce paints that are virtually odour-free - the Breatheasy range by Crown is one example. Most leading brands now produce high-quality water-based acrylic paints which outperform the older technologies of vinyl and oils.
In symbolism you do need to look for the hidden meaning, and it's absolutely pointless in pop art, op art, art nouveau or hyperrealism. Each style and genre sets forth its requirements, so brush up on the movement the artist belongs to before you proceed.
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!
The reality is that the guys shooting paint, even at the cheapest shops, know how to do it. They spray a dozen cars a week and have plenty of practice laying down smooth, consistent coats of paint. They work quickly and efficiently because they have to or they don't make money. They don't really make their money on shooting paint. They profit from body work because it takes time and insurance work because it pays well.