[slorak]

I can't imagine why the paint would not dry out simply because a penny was in there. It will definitely help in shaking up the paint. The only thing I would think of to watch out for is the liquid in the paint could cause the penny to tarnish and the tarnish could mix into the paint slightly altering its color.

I have heard that glass agitator beads are the best - followed by stainless steel beads - as they won't rust or tarnish.

If someone knows the "chemical" or "scientific" reason why a penny would halt paint from drying out I would be very interested in hearing about it - however I suspect that the author of the article has to hard facts on it and is somehow associated penny in pot with it not drying out. Could just be coincidence.

Cheers,

-Mike