I solved the same problem once by taping over the hole with Scotch "Magic" tape - painting it all with gloss paint, and feathering the edge of the paint with some very fine wet&dry.
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Overhead, the Albatross hangs motionless upon the air,
And deep beneath the rolling waves,
In labyrinths of Coral Caves,
The Echo of a distant time
Comes willowing across the sand;
And everthing is Green and Submarine
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