[FRPGUY]

John, I use both resins in the GT40 bodies I make. The vinylester's end product is a stronger, more ridged, and most important; more stable in high heat. It doesn't go soft in the sun light. It doesn't burn as fast as polyester also. The down side of vinylester resin is that it is more difficult to use in the wet layup process and it costs more money in it's promoted state. Four years ago I was paying $400.00 USD per 55 gallon drum, now it's $1800.00 USD per drum. It was the same resin that Factory Five uses. Polyester is $750.00 USD per drum. I'm making everything with polyester now! I buy the best polyester that's avialable now.