I am constantly picking up old rusty tools at garage sales that I derust using the battery charger method (like reverse plating). It does a nice job, but other than waxing, is there an easier way to keep them from instantly rusting? I occasionally use waste engine oil, but it makes them real oily (duh). My thinking was to maybe thin the oil so it still covers, but soaks in a bit, or excess runs off. Has anyone else experimented with this idea?
I don't like wax because it must be buffed out or else it looks bad because of all the buildup in the hard to get to areas. I melt paste wax an apply it with a rag, but it's a hassle to heat it up for just a tool or two. I don't mind a slight oil film-especially on mechanics tools. Ideas appreciated!