CPBassFishing

Hey everyone i'm new here. I love fishing big swimbaits and want to get into making resin baits. I know that i need to build the bait out of wood, make a box for the mold, and pour RTV Silicone into the box to make the mold. After that I pour urethane into the RTV mold to make the bait. I am planning on using Alumilite. I have a few questions. Are microballoons required to make the bait float or does alumilite float by itself? Is it necessary to remove bubbles from the bait? Are there any safety hazards that go with the materials (fumes)? Will i have to do this outside? Thanks, Cullen