Just learnt ofOsmo oilfrom Laura. It's vegan and made in Germany

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Comment 1, below, has sources for hard wax and varnish. Carnauba wax seems to be the hardest. I bought 500g fromcornelissen.com Using a double boiler I heated the carnauba wax and linseed oil. Comparing the end product tohumblebeeandme.com/quick-guide-carnauba-wax . . the mix was probably 1:8 wax to oil. I did directly heat the container for short periods to speed up the melting. To apply I diluted 1 part of this soft wax with 2 parts turpentine and brushed it onthe three main beamsonce they were in situ.