5200 has its uses...but generally best left for things that will never/hardly ever need separating. It normally is very tough to remove...but I found a product that does a good job on it and is safe for your boat surfaces/paint.

Debond Marine Formula

I use 5200 (or sometimes the faster curing 4200) to hold the mylar centerboard slot strips on my Tornado's keel line. Holds that on indefinately until I need to swap them out.

Note the cure times for 5200 are 24-72 hrs, depending on humidity (reaction is moisture dependant).