My aftermarket CF hood's mesh insert failed when I hosed the car off with cool water, after it sat running in the sun. Not only was the expansion/contraction enough to cause all the plastic screws/nuts to fail at once (I'm guessing the reason), but the silicone used to glue the mesh to the aluminum frame failed as well.
Best of all, the aftermarket aluminum billet radiator brackets must expand as well, because the plastic grommet (?) that holds the hood stay bar in place fell out of the bracket's hole, and the hood fell on the bar chipping the hood's edge.