Back around 1998, I purchased two cans of red.  I used these to coat around 8 or so lead 'bullet' diving weights.  Fast forward 14 years.  Some 2,000 dives later, the coating is still solid, red and protective.  Couldn't ask for much more.  I would never ding the product in a review for the fact that the lid does not keep the volatiles from volatilizing (an unrealistic expectation).  Unless you freeze the product after opening (as I do with a high volatile content rubber repair compound), don't plan on being able to use any remainder.