The Portland State Aerospace Society (PSAS) builds, designs, and launches open source amateur rockets. If you haven't heard about PSAS, watch my five minute Ignite Portland 2 talk and follow along with the sides.

In this PSAS episode, Tim shows off the airframe shell he's been working on:

Tim's vacuum setup for pulling epoxy into the fiberglass airframe isn't perfect. There was a large piece near the top where epoxy didn't flow.

Tim brought a work light to demonstrate that the fiberglass shell is slightly translucent. Andrew (in his bun-bun shirt) demonstrated said translucence.