Removing items bonded with 5200 today is super simple. Debond is available at most marine supplies and it will break down 5200. You will have to exercise some patience and persistance because it won't dissolve immediately and may require some working but it WILL work. Keep it confined to the target area.
Have used it myself as a professional marine oufitter/rigger/tech since it's appearance and with this product on the market I use 5200 fast cure in most instances where I would not have in the past. The days of pulling gelcoat off with the hardware item like a leaky hatch is history with proper application and procedures.