I found these buttons at the Salvation Army the other day for cheap. I like the ones on the bottom row the most, then the middle, and least of all the ones on top. So, would you use metal buttons on your CQ? Why or why not? Does anyone have any idea of how old these might be? i guess I would use them on something that was not meant to be an heirloom, but what about on something special? Could rust or decay be a problem? Could you treat them to prevent problems? Coat them with nail polish or something?