One way to fix a bent comic book is to carefully iron it on a low heat setting with a piece of cloth in between. But be very cautious not to damage it. Another option is to put it in a frame and let the weight of the frame straighten it out over time.
Fixing the spine of a comic book can be done by laying it flat and applying a layer of clear varnish or sealant. Let it dry completely before handling. You could also seek professional help from a bookbinder if the damage is severe.
Well, it can fix warp to a certain extent. The success rate varies based on factors like the type of comic book material and the extent of the warping. A good press can make a significant improvement, but it might not completely eliminate the problem in all cases.