Composites

Material Selection

Google's cache of the now-defunct www.pe.net/~rpm/about2.htm mentions:

• All gas tanks are made of vinyl ester resin for chemical resistance to gasoline.
• Fenders and side plates are made of iso-flex or DCPD resins, no low grade ortho resins are used.
• All parts are made with iso-flex gel coats to reduce cracking.

Vacuum Bagging

• Vacuum Bagging On $50
  • Glad ForceFlex trash bags are polyethylene and are suitable for vacuum bagging with epoxy.

• Vacuum Bagging Basics is a good overview from a boating perspective.