Scotch 77 is basically rubber cement. A reversible glue. Lots of solvents
will break the bond. Water in not one. Oil ???  It is a soft line glue that
might allow the two layers to slide wrt each other.
Epoxy in its many compositions is a hard line glue with the ability to
provide structural gap filling. There is probably some chemical that will
dissolve it but it is considered a permanent glue. No solvents will work.
If you never would want to again separate the layers, why not use epoxy?
Bond once and get on with sharpening life.
Frank

On Mon, Aug 10, 2020 at 12:25 PM dks@t...  wrote:

>
> I have a boxed 4-15/16 long x 1-5/8in (natural) coticule stone which has
> been delaminated. I would like to restore it but am uncertain what glue to
> use after cleaning with alcohol. I can only think of two options - epoxy
> and 3M Super 77 spray adhesive. All comments or suggestions are welcome.
>
> Don
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-- 
Frank Filippone
BMWRed735i@g...