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.
Mewar School of Painting: These represent hunting scenes which are painted on cloth and handmade paper using stone colors
First consider the size of the painting. The more impressive the subject, the higher the emotions it appeals to, the bigger it is. Religious, mythological paintings are often huge - their massive energy makes you shiver. It is pretty understandable with figurative paintings like Rafael's "The Sistine Madonna", and more subtle with color field paintings of Mark Rothko. People are often overwhelmed with religious tremor in the presence of his artwork, and the size factors in. Also, the subject often calls for larger canvases - battle scenes need space and cannot be fitted into a smaller painting, while some subjects will get lost unless depicted in a smaller size.
Step three: go online and study the basics of shadow and light. It's a visual thing, and too complicated to talk about here. But once you see it, it'll come to you quickly. Simply Google "shadow and light in painting" and the basics will come up. Once you know these rules, you can apply it to any shape, any form, any painting. And it'll make you keenly aware of shadow and light on virtually any object on earth. It's what makes a painting three- dimensional and expensive looking. You can also buy art books on shadow and light at any bookstore. But make sure you sit down for a couple of hours and study it. It will come quickly to you, I promise.
Is some color dominating?
Green is one of the main colors. It is physiologically optimal since this is the color of the natural environment, under the conditions of which people's color vision was created. Green color corresponds to stability, strength, constancy, perseverance, willpower, and the feeling of self-significance. Green color symbolizes prosperity and new beginnings, it calms you down and counterbalances. This color neutralizes the effects of the main colors and helps disperse negative emotions. It brings tranquility and peace, helps concentrate and increasing your likely hood in making decisions.
Gloss - These paints have a high sheen level and are usually used on woodwork.