spar varnish

noun

a durable, weather-resistant varnish applied to unpainted wooden areas, especially on ships.
a varnish made from sulfur, rosin, and linseed oil.

Origin of spar varnish

First recorded in 1905–10

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

spar varnish is the best for this purpose but shellac will answer.
Outdoor Sports and Games | Claude H. Miller
When linoleum begins to show wear a coat of spar-varnish or carriage varnish will restore it satisfactorily.
The Library of Work and Play: Housekeeping | Elizabeth Hale Gilman
After the dope is on the fabric the surface is protected further by a coat of ordinary spar varnish.
America's Munitions 1917-1918 | Benedict Crowell
The one suggested in the drawing has red wheels with the remaining parts of the kiddie kar finished natural with spar varnish.
Toy Craft | Leon H. Baxter
It will be necessary to protect it from the weather when not in use and frequently give it a coat of paint or spar varnish.
Outdoor Sports and Games | Claude H. Miller

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