What is the best wood for signs using 1/16 inch bits? I'm making signs that have NYPD and FDNY badges on top of USA flags. I think that the best wood is poplar or maple. My woodworking teacher is a cheapskate who won't buy hardwood because hardwood cost more money than softwood. I tried putting polycoat on softwood before cutting but it didn't work. Letters usually have little pieces broken off. Is plastic better than wood?