I've decided to wrap the fuselage in fiberglass. Honestly, I think the fuselage is strong enough as it is, but because I only used 1/16" sheeting I didn't want to take the risk of sticking a finger through the side during a hanger incident.
I used .5 ozs glass cloth and Zip finishing epoxy. I've got some sanding to do, but all in all I like the result and the fuselage does feel a lot stronger.
I also managed to get the rudder hinged and temporarily mounted.