Have any of you used the metalic silver, gold, or copper pigment blocks sold by Bitter Creek? http://secure.candlesupply.com/catalog_page.cfm?queries_index=index7&ProductCodeID=38&ProductSubCodeID=49 Since it is a pigment do you only dip with it or can you use it for the whole candle if the wick is waxed? I want to make some Silver candles and was wondering if it is worth the huge expense. Julie