I do my molds in a metal, square cake pan. Super glue to the bottom well. To start to release the bubbles, if there are some, I tap the pan with a kitchen knife. This will start the bubbles toward the surface.
If you pour the resin into the mold very slowly you should reduce the amount of bubbles.
Oh, I forgot, do not stir the resin after you add the activator like you are trying to make whipped cream. Do it slowly.
Hope this helps.