Debond Marine Formula works well to remove 3M 5200 but you might need to be patient. The videos show it working within minutes but I had another experience. I used it to remove my outboard bracket. I applied it and waited for about 15 minutes but there was no sign of it working. I decided to leave it on the boat rather than damage the fiberglass but several months later I found the bracket on the ground. It had fallen off under its own weight - which was probably only a few ounces. . I have no idea how long it had been there. In other circumstances it worked much faster. The surface of the glass was perfectly smooth. It does a great job but just take your time and be prepared to wait. 

Graham Stewart
Agile, Rodes 22, 1976
Kingston Ontario

-----Original Message-----
From: Rhodes22-list [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf Of Chris Geankoplis
Sent: Monday, October 26, 2020 11:43 PM
To: The Rhodes 22 Email List
Subject: Re: [Rhodes22-list] removing tabernacle

Hey Jesse,
Sounds like PL5200. Strongest stuff in the world. Just about impossible to
remove. You might make a hack saw frame but with the blade at 90 degrees to
a normal one. Slowly cut between the cabin roof and tabernacle. At some
point you can apply a rotational motion and should get it off.  You will
Have an ugly scarred area. Research to see if they have come up with a
solvent for 5200. If so, use that rather than the butchery method. Good
luck.

Chris Geankoplis
Enosis.

On Mon, 26 Oct 2020 at 21:51, Jesse Shumaker <jesse.laten.shumaker at gmail.com>
wrote:

> Hi, I'm attempting to remove the mast tabernacle in order to install the
> Dwyer Halyard Organizer plate (part DH288).  The three screws came out
> easily, but the tabernacle is still attached very strongly with an
> adhesive.  I don't know what adhesive was used.  The adhesive is colored
> white.  I tried heating up the plate with a soldering iron and tried to
> squeeze in a razor but have been unable to break the seal.
>
> I would appreciate any tips from the group on how to free the tabernacle
> from the cabin top.  Thanks in advance for any advice!
>
> Jesse Shumaker
> S/V Zephyr
>