I haven't used mine in over a year (just not at that point in my projects), but when I last did the stuff was already at least two years old, and it seemed less eager to do the shiny chrome thing that it does. It had good shine, but it seems I had to lay it on heavier then before. Also, if I squeeze out a drop for my paint brush, it must be used immediately. If I waited a minute, it wouldn't develop a good shine when applied to the part. Could just be my imagination. In a few months I'll be into the stuff again, so it will be interesting to see how it performs.
Speaking of 'the chrome thing that it does', has anyone ever applied Molotow and then watched it with high magnification? There is some crazy stuff happening when the stuff is first applied, or first exposed to air. A weird sparkly action and joining of particles to form the 'chrome' effect. Pretty interesting.