Several months ago, I purchased an issue of Scale Model Enthusiasts (can't remember issue #), and one article indicated that to effectively achieve correct weathering results on tank tracks, one can use acrylic paint (black and reddish brown), and once the paint dries it will turn to a realistic rust look??! I for one attempted this several times and have failed!? What else can I do to achieve this result?? Any suggestions will be greatly appreciated! Thanks!