I would like to paint my m4 two-tone with tan and black and give it a look similar to one of these. -I prefer the one with the tan receiver: I have a couple questions: 1) I've read that Krylon or Rustoleum are the best types of paint to use. Would these paints give a good finish on both metal parts (receiver) and plastic parts (stock)? 2) When painting a receiver what is usually done with the trademarks that are already present? Would there be an easy way to make a stencil? Any other suggestions? Thanks.