The simple addition of oil to a candle's wax will create an interesting textured surface. The mottling that results will produce a random design on the surface of the candle. Exactly what kind of mottling result you get will depend on the percentage and type of oil you use. The best oil for mottling a candle's surface is one that is light and odorless (although you can use scented oil). Mineral oil (usually sold in drugstores as a laxative) will work well, as will any vegetable oil.
To make a mottled-surface candle, add the oil to the melted wax just before you pour. For a translucent effect, add l to 2 percent of the wax's volume in oil. For crystalline shapes on the surface of the candle, increase the percentage of the oil in the wax's volume to 3 to 5 percent.
After you have poured the candle,