Direct sunlight and manmade composites are not a good idea, the ultraviolet component in sunlight typically breaks down composites to something less desirable. A recipe for deteriorated plastics.

You would likely need to build a FRAME capable of holding the top in perfect shape and alignment, perhaps could be done with say, 2X2 and 1X2 pinewood.

Then you would need a temperature adjustable OVEN that the top would fit into.

Not as much heat as TIME here, I'm thinking.

You should also take the side that is not warped off of the thing before this treatment, likely at the hinge points, to prevent from warping the unwarped part.

Likely not worth the effort IMO, another case is readily available and prices aren't that bad.


--Mac