glazing

Glazes are not simply thinned oil paints. Much of the original character and body of the oil color used to create the tone is still within the thinned paint. The medium used will help determine the finished "feel" of the surface, but turpentine and paint mixed together is not a true glaze. Such mixtures are often used as preliminary washes on fresh canvas prior to laying on any full-strength oil color, but the washes lack the vibrancy of a glaze.
Areas to consider when oil glazing is part of your plan include the quality of medium used in the creation of your glaze. Good quality linseed oil (stand oil) is a favorite with professionals because of the glossy and transparent possibilities. It dries to an enamel-like finish. But for some artists, linseed oil may be too slow drying or may impart too much sheen. In such a case, a fast-drying medium, such as an alkyd medium, might help. Alkyd mediums dry with far less luster than stand oil. All brands of paint have mediums and oil additives that work best with their paint formulas, but testing will help you create your own glaze palette.
Some oils can yellow over time. If this would not complement your work, consider use of a wax glaze or a specially formulated glaze medium. New wax mediums add translucency to oil paints, making them more brilliant, and can be used to create lively glazes as well. These mediums offer the added benefit of being an outstanding permanent topical treatment (applied after the recommended oil painting drying time of about six months). At the appropriate time, simply brush on the wax medium, remove any excess with a soft cloth and lightly buff the surface to a low gloss finish. The wax can be thinned with turpentine for lighter application.
Oil glazing works best on more "solid" grounds such as sized canvas, canvas panels or ClayBord and does not function as desired on paper or illustration board. Super-absorbent surfaces decrease workability or color layering, and their dry surface does not give the sheen that is most often achieved with oil glazing methods. Canvas paper can be used if the layering is done lightly and the areas are not scrubbed or overworked.
Any oil color can be combined with a chosen medium to create a glaze. Layering of several colors allows for subsequent details to be laid over existing details as well as tones to make any oil painted surface more luminescent.