Hello! My father has graciously cut and sanded 150 wood rounds (they're about 3 inches in diameter and 1/3 inch thick). My fiancé and I plan to write "M+S" and our wedding date on one side and each guest's name and table number on the other side. Each wood round will have a hole drilled through the top and a loop of twine so that they can be hung from a tree at our outdoor reception (and eventually on Christmas trees, if our guests so choose!). These wood rounds will serve as both the escort cards and a small favor. I was wondering if anyone has advice about what type of marker or pen to use to write on wood and if the wood should be sealed before or after writing on it. Thanks for any help you can provide!