Our cold enamel can be applied to most materials eg. gold, silver, platinum and plastic.  The enamel has to be used with a katalyst in order to harden.  Four (4) parts Katalyst to ten (10) parts base enamel needs to be mixed very well and left to stand for approximately 10 minutes in order to start the chemical reaction and rid the mixture of most of the bubbles.  The mixture can be used up to one (1) hour after mixing, depending on environmental conditions.