Use the best materials to get the best results. This goes for whatever you’re doing – painting, cooking, knitting, gardening, well, the list goes on and on. I’ll be focusing on oil painting materials here and now.
Paint that won’t stick is the use of a poor binding material. For those beginning in oil painting, slick paints are definitely a hinderance even when you’re using high quality paint, just do to the fact that certain areas of the painting are often overworked in order to get things “just right”. If you’re starting out with a material that is slick right from the beginning, it’ll be hard to work over any colour that is laid down incorrectly at first. Also, texture in the paint is often lost and that is definitely a pity.
Poor pigments and colours that are not saturated enough and poor colourfastness are all very disappointing qualities in paint. Often batches of paint will change from one to the next with poor quality paint. Cracking and a loss of colour can be evident in a fairly short period of time. If you ever intend to sell your paintings you do not want your customer or gallery disappointed by poor materials.
All this being said absolutely brilliant paintings are done with what I would call poor quality paint. Many of the impressionists used (what I would call) poor paint supplies, yet the results are splendid! If you’re going to use inexpensive paints just be aware that there are limitations and there will probably be a few more disappointments along the way than with higher quality of paints.
Expense of materials is also driven by how long your materials will last for. Oil paints will survive for a couple years if they’re kept under the correct conditions (completely sealed and in a cool, but not cold location). As far as making them go the distance – a higher pigmented paint will obviously go farther than one with little pigment.
Some colours are affected more than others by quality – pthalo blue is such a strong colour to begin with that using a cheaper version of this material is better than a cheaper version of any yellow colours. If you’re going to save on paints – don’t do it with yellows, reds or whites.
So, here is my current list of paints I’m using: Gamblin, Utrecht and Windsor & Newton. My array of colours often include: Titanium White, Hansa Yellow Light, Cadmium Yellow Medium, Indian Yellow, Transparent Red Oxide, Napthol Red Light, Quinacridone Rose, Alizarin Crimson, Dioxazine Purple, Ultramarine Blue, Pthalo Blue, Olive Green and/or Prussian Green.
By no means should you stick to any list that anyone gives you about art supplies (unless it is specified for a class). Start with products of a known high quality at first, then explore from there.
One of my favorite painters that I know, Bobbie Mac, intermixes high quality paints with inexpensive paints. She does her research so it works out very well for her.