Warped fiberglass seats: will they spring back?

[JCKnife]

If fiberglass troop seats have been sitting around, possibly for years, in a warped or curved position (not creased or broken) will they come back straight? Maybe in the sun? I don't know how fiberglass behaves.

 

[combat32]

Sit on them for a week or two I would think sitting out in the sun would be a good thing, wrong time of year though.

 

[robr]

I run a Composite tool shop if we have a fiberglass tool that warps we put it on a large flat cart and roll it in to a large oven at 150 deg with weight on it and it will warp back