I have had my A&C on the road going on 8 years now, 25k miles. It is still in the original gelcoat and looks like a nice paint job. I plan to paint mine one of these days.
The frame is very solid and made of rectangular tube steel. The body quality is probably the best in the industry. Trunk, hood, doors are all double lined. Edges rolled. The glass is pretty thick too. Total weight is around 2350lbs.
The A&C body is very close to an original.
Any build will only be as good as the builder. My build site is at
http://www.priveye.com/cobra.htm