Hello dear, If the polymer  employed to prepare the composite is thermoplastic, it can be reprocess by employing conventional methods (extrusion, injection, thermoformed, etc), in the case of thermoestable polymers it is almost impossible, since these materials can not be reprocess. Somethings thermostables polymers are employed to repare thermoplastic polymers.

Indead most thermosets cannot be repared by heating or solvents, because they are in contrast to thermoplastic materials not meltable or soluble. But there is one class of thermo-reversible thermosets whose network is formed by the Diels-Alder reaction of furane rings and bismaleinimides (see links). By heating up, the bonds of the network are cleaved and on cooling the network is reorganized back to a new network. Cracks are healed by this procedure.

http://onlinelibrary.wiley.com/doi/10.1002/macp.201100410/pdf

http://www.expresspolymlett.com/articles/EPL-0002808_article.pdf