Acrylic Hatch glued will not come out

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Acrylic Hatch is a flat 12 by 14 piece of plastic glued on four
Sides by silicon glue.

Will not come out.

Am going use heat gun.

Then cut up the hatch in strips. Don't need save hatch.

Was going use force but don't want remove gel coat as well.

Any ideas ?

Thanks.