They were left assembled for a couple months and ridden a dozen or so times in salt water. Corrosion – galvanic or electrolysis – whichever is the correct term, will be inevitable without regular maintenance or preventative action. The bolts were coated with a corrosion preventative or isolater and came loose with ease.
First I tried soaking in fresh water for several days, then penetrating oil, then put in a freezer for 15 minutes, and hitting the wing with a rubber mallet each time. Also tried bolting the fuse to a wood plank and then used a couple 2x4s to try and pry the wing off. Then tried hitting the fuse with a socket extension and heavy hammer half a dozen times and it didn’t budge:
Finally decided to give the fuse a longer freeze to hopefully shrink it and “break” the bond to the wing: