Clear resin mold injected with liquid silicone rubber

Looks great! I’ve some experience myself with casting silicone in standard clear resins molds but always have some airbubbles trapped inside the cast model. The air bubbles are introduced into the silicone when I mix the two components. What did you do to prevent this? Also, did you use some mold release spray to create a “skin” inside the mold to protect the silicone? The kind of silicone I use gets contaminated when it comes in direct contact with the SLA material.

Kind regards,
Bart