Turner's Polish - shelf life

[BobRad]

I have some Lee Valley Turner's Polish that's been sitting unused for a couple of years. I was going to buy some more but noticed its pricey. How can I tell if its still usable?

http://www.leevalley.com/en/wood/page.aspx?p=20105&cat=1,190,42942

 

[RussFairfield]

Put a drop on a mirror and spread it to a thin film. Wait and see if it hardens and how long it takes.

It is still good if it breaks up when you scrape it off with a utility knife blade the next day. Throw it away if it is still sticky or if it peels of as a rubbery mass.

If in doubt, always error on the safe side and throw it away.

 

[BobRad]

A $28 a bottle I'm not about to throw it out. There was no sediment or signs of oxidation I tested it on some scraps and one pen and it seems to be ok.