Carbon foil left on an ally fuselage in salt water creates galvanic corrosion. Tsk tsk. Foil fizzles onto fuselage.
Don't bother with heating and cooling and liquid penetrants n WD40.
Fill your bathtub with 4 x 2L bottles of vinegar, top up with warm water to the top of the join and soak ur weapon for 12hours.
Static rig flat-strap webbing from a roof beam or rafter around the foil and tap tap the mast/fuselage down with a rubber mallet.
Tap tap tap. Victory. . . . and you wont ever leave ur overpriced carbon on ur cheap ally again. 
And we should never forget the use of brown vinegar on our foil cover zips, if they get corroded (never tried white vinegar).
May need a couple of days to clear, depending on salt build up.
Don't force. Gentle pulls only 😂
