A friend has a Norwegianicon K98icon which a previous owner appears to have protected with a medium-thick coat of varnish. What is the best way to remove the varnish and refinish the stock in a military finish, without damaging the glue in the red-layered laminated stock?

The varnish looks steaky and uneven, so I don't think it is the thin coat of varnish the Norwegians applied.

Many thanks!
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