Superform ali is pretty hard stuff, i dont have the spec sheet but with a good coat, of waxoyl black underseal mine seems to have survived even newly laid chippings.
One thing, if you remove the front wings check the flat panel at the rear of the wing, im not sure how morgan afix this to the main wing pressing but its seperate part on my 2011 car. Its seemed to be glued in place , certainly not ali welded. As i tightened the 2 rear bolts that secure the back wing to the front wing, just in front of the rear wheels, this small closure panel began to come away from the main wing pressing. Needless to say plastiç metal saved the day. Beware dont horse those 2 bolts hp too tight.