I use only professional grade paints for both my watercolours and oils. My choice of watercolours may vary between Winsor-Newton, Holbein or Schminke. My choice of oil paint varies between Holbein, Gamblin or Williamsburg. Arches or Fabriano are my preferred watercolour papers. I choose only the archival quality grade. My oils are painted on Ampersand hardwood panels or masonite panels upon which I fix linen. I then place two or three coats of gesso on the linen letting each coat dry and lightly sanding between coats. I will then paint on a layer of Gamblin or Holbein ground and let it dry several weeks before painting on the surface.
Generally, my approach to watercolours is that of glazing. I will use a hot pressed paper upon which I draw my image. I then begin the slow build up of colour and value by glazing washes and letting them dry between layers. Larger watercolours are done on cold pressed paper and I will use wet-in-wet techniques as well as glazing.
My oil paintings begin with a rough gesture sketch with a small 1 or 2 hog bristle brush dipped in thinned oil paint. I then rough in the masses of colour having keyed in the value. The painting is worked until I can do no more for that painting session. Once the first layers of paint are set, I will add more colour by glazing or scumbling certain passages until I reach the desired effect. Usually, no more than three to four passes (for my larger paintings) are necessary.
Generally, I choose from a limited palette of only seven colors. Of the seven that I normally use, only four of five will be used for a painting. I prefer to mix my own colours as it gives me greater sensitivity to what goes into coloured neutrals as well as understanding their colour temperature. I like to keep things simple. For me personally, too many colours to choose from make the painting process too complex. My palette in watercolours and oils consists of cadmium yellow pale, cadmium orange, cadmium red light, permanent alizarin, French ultramarine, cerulean blue or cobalt blue and sometimes viridian. Of course, white is used for oil painting and I will use Titanium-zinc white or Holbein's ceramic white.