No you do not have cracked fenders as viewed in your pictures. It is also pictured on our "ejector side" passenger fender.... ejector side of molded plastics is most often from the side not in clear view, or in a prominant view by customer or others... it also is where the date code, part number is found and identifies as to what plastic material it is made of. Molded automotive parts are given a definition to each surface... A - being most visible surface, then B, C, and finally D - being the most hidden.. for example your skid plate underneath your car would be a "D surface" while the interior dash would be an "A surface".
The ejector side of the slingshot hood is most likely a B surface. It is seen, but only when the customer opens it.
Ejector side of molds means there are several moving steel parts. Because it has paint on these "seams" its not from hanging on the paint racks during paint line. And because these "seams" are not visible to the "A surface " or topside of the hood - one can assume these are ejector plate markings. Which is not a defect... crack... it is the quite normal for large plastic pieces being assisted in removal from the mold in the injection mold process.