Quote Originally Posted by LouiePete View Post
Thank you, sir. I was really screwing around and used two pennies glued together as the wedge. I probably should have asked for some advice before doing that as I have no idea how that will hold up in the long run or if the copper plating will jack up or discolor the wood at the wedge, but I thought it was a fun idea at the time and had to try it out.
Just be careful not to get that wet. Copper and zinc have a good difference in standard reduction potential, so you'll get degradation (and possibly some current) if an electrolyte is present (the same way you can make a battery out of pennies).

edit: not really a caveat though, as it's a pretty slow process