I am starting to put my 37' 45" together and 95% of my parts have nice, old aged black paint... I really would like to keep everything old paint and finish... The tanks have been repainted years and years ago and have a very nice patina. I think it would look cool with a set of he 36-39 waterslide decals with a little age. I thought about maybe some sanding or hard buffing. Any suggestions on how to put some nice "fake" age on a decal?