Woodreaux, It takes two screws. One for the finish to exit and the other to keep the presure equal to atmosphere. Replace the screws promptly before much air intrudes. The stoplose bags look like a really good solution. Can we google up a source?
You are neither compressing the air or creating a partial vacuum when you decant part of your bottle of Linspeed Billy. The volume of air that comes into the bottle is exactly the same as the volume of finish that was removed. It makes no difference whether the liquid was poured out of a screw hole in the cap, or if the entire cap was removed. Either way, if you pour out some fluid and promptly reseal the bottle, the same amount of air enters the bottle. The only slight variables might be storage temperature, atmospheric pressure due to altitude, or relative humidity that may accelerate or retard finish degradation. Some years ago, I had a bottle of Linspeed that was very slow to set up and harden. I assume there was insufficient dryer in that batch.
With few exceptions, whether you are storing paints, finishes, gunpowder, food, pharmaceuticals, chemicals, gasoline, ect., the best conditions are cool, dark, and dry. Heat, light, air, and moisture are the storage conditions to avoid.
It couldn't be simpler. But now we have someone who calls Conservatives "Science deniers" repeatedly in denial of some very simple science. Just more evidence that Liberalism is a mental disorder. Time for you to shed some more crocodile tears, and have another hissy-fit... just because someone recognizes the fallacy of your silly notions.
