Joe, just posted to provide some long term shelf life data. It appears the color particles settle and don't dissolve easily after long term storage but the lube characteristics remain. I mixed this batch in a clear Coke bottle and I can see sediment on the bottom that gets suspended but not dissolved in the mix. I just use acetone, may try adding some MEK next time I coat. I tend to cast large batches & coat for pistol, which I don't shoot much, so long time between coating sessions. Don't think it is a problem for volume coaters.