Fenders most likely No.
I've looked into it and its a wash at best. Factory fenders just don't weigh that much. So the "lightweight" fiberglass fenders don't save much and typically suffer from poor fit and finish. The "HD" fiberglass have better fit and finish but weigh as much as oem steel.
A fiberglass Hood can take some weight off.
Your 5mph Front bumper and its brackets could be another area to lose weight.
