Visual Reminder to Stir

While finishing a project for Christmas, my quart of Arm-R-Seal Satin stopped having a tight fit.  I transferred the finish to a mason jar.  It was very well stirred at the time.  The next day, exactly 24 hours later, this is what the jar looked like:

Remember that non-gloss finishes have flatteners suspended in solution so they need to be stirred.  I knew that, but was surprised at how much separation happened in just 24 hours.  Honestly, after just 12 the division of layers was clearly obvious from a distance.  So remember to stir!

Now, I'm not sure what happened to the quart container and why the lid was no longer sealing tightly.  Might have had something to do with my mallet...