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Natural Earth Paint Spirit Varnish.

It's basically shellac but has some oil of some kind added. Maybe other things too.
I'm wondering if it might be more durable for classical guitar than straight shellac

Thanks. Would love to hear if you have used it

I haven't tried that but another similar product that was for floors.

https://www.shellacfinishes.com/product ... lac/?gQT=2

I wasn't too happy with it.

I have had good luck with Royal Lac

I thin it down 2 parts shellac to 1 part 190 proof alcohol. That I've been very happy with.

Here's a video that might be helpful:

https://www.youtube.com/watch?v=__CVrPKS_Io

-David