03-08-2010, 09:10 PM
soak your mold down first with water, this will get rid of the air in the plaster if you dont do this the plaster will bubble/fizz in contact with liquid and will give yo airbubbles.Also a good idea to do a first coat by just putting a bit of latex in the mold and rotating it to ensure full coverage before filling the mold up.tapping/ vibrating the mold when filling and once filled will also help release any air bubble that may be trapped in any undercuts of the mold.hope that helps