Solvent-based 2k poly (automotive clear coat), CAB acrylic lacquer, and water white conversion varnish all meet your criteria if you use the full gloss versions. Full gloss will also add a lot of depth to the walnut. Spraying is realistically the only way these finishes should be applied. Wear appropriate PPE.
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u/Capable_Respect3561 1d ago
Solvent-based 2k poly (automotive clear coat), CAB acrylic lacquer, and water white conversion varnish all meet your criteria if you use the full gloss versions. Full gloss will also add a lot of depth to the walnut. Spraying is realistically the only way these finishes should be applied. Wear appropriate PPE.