For some time now I have been using a beeswax finish to apply to my forged projects. The recipe is very old and traditional. The ingredients are simple and were readily obtainable in the past.
You can use this on almost any material. It will last a few months outside in the weather and for a few years out of the elements. I have been placing it on my tools that stay outside on my forge. It helps keep my hammer handles sealed in the weather and does a good job.
Its simple and very useful.
Please be careful. Some of the things I do are dangerous. It is not my fault if you get hurt. Use your brain, be safe.