What is the best way to get ride of rust? I dont mean deep rust just alittle more than can be removed with a rag and oil. I live down here in Florida and the humidity does a number on blued barrels, I try and wipe them down as soon as I get back indoors but still have a little that I cant seem to get ride of. Watched a video that used an onion and steel wool, I was kinda sceptical of this method, has anyone done this????