An original wet recycling method is developed for large carbon-fibers reinforced-polymers composite panels, addressed through a proof-of-concept fabrication of a new composite part based on recycled fibers. The recycling process relies on formic acid as separation reagent at room temperature and under atmospheric pressure conditions. Electron microscopy and thermal analysis indicate that the recycled fibers are covered by a thin layer of about 10wt.% of residual resin, alternating with few small particles, as compared to the virgin fibers exhibiting a smooth surface. The mechanical properties of composites based on neat and recycled fibers are determined from interlaminar shear strength, compression, compression after impact and Iosipescu shear tests. The recycled composites show promising shear and strength values with a deterioration of performances limited to about 10 to 33% depending on the property as compared to the reference. The recycled carbon fibers can thus be reused for structural applications requiring moderate to high performances. The loss of properties is attributed to a lower adhesion between fresh epoxy resin and recycled carbon fibers having lost their sizing, partly compensated by a good interface between fresh and residual cured epoxy thanks to mechanical anchoring as well as chemical reactions.