Are we preserving varnish, or making Molotov Cocktails in those
: glass mason jars?

Both!

: Why not just mix a tablespoon of baking soda with a tablespoon of vinegar in
: a plastic cup, and pour off the resulting carbon dioxide. You won't see
: it, or smell it, but just hold the cup at a slight angle over your open
: jar and, while the baking soda fizzes, the CO2 will flow out of the mixing
: cup and into the varnish can, displacing the air. Don't pour any of the
: vinegar/baking soda mix into the varnish can -- jsut the fumes that come
: off of it. To check that you really are getting some CO2 from your
: "brew", move well away from your paints, finishes and solvents,

That's the home brew I forgot the recipe for. I'll give it a try.

LP works great - just dont light it.

: and light a match. You should be able to extinguish it with the gas coming
: out of your mixing cup.

: You can also get CO2 from a soda bottle. Pop open a fresh drink and pour the
: excess CO2 into your varnish can when you finish for the day, then drink
: the soda. Did I mention that you get CO2 from fermented beverages like
: beer, too?

: Hope this helps

: PGJ