Introduction: Refurbish a Rusted Crowbar

About: I pursued my technical interest and found myself a job as a product development engineer. In my spare time I keep spending time on DIY projects to upgrade my stuff to my own preferences.
How to refurbish a old and rusted crowbar.

Got some old rusted (partly) iron tools from a friend or your grandparents? These these are usually of higher quality and strength then the basic tools from a local shop. So don't be to quick to put the tools in the trash bin.

Using a steel brush and a file (the workshop tool to treat wood and metal) you can restore the the tools to former glory. 

Photo 1: The beginning
Photo 2: The end result

Step 1: Tools and Fixation

It is very time intensive to use a hand steel brush, therefore I use a steel brush that can be mounted in an electric drill. 
Find yourself a drill with a high rpm, and don't use  a cordless drill since you will be switching batteries every 5 minutes.  

Be sure to use a proper clamp to securely fixate the rusted tool! You are using a steel brush at high speed and don't want to shoot into your clothing or other surrounding objects because the rusted tool was not secure enough.

If possible, use a drill with a second handle, this helps positioning and reduces the risk of damaging your own hands.  

Step 2: Remove Rust

Now the real work starts. 

NOTE: Wear eye and ear protection !!!

NOTE 2: There will be very fine dust, so work in a ventilated room or outside.   

Use the drill on hign rpm and brush of all the rust. You have to use some force (push the brush hard against the surface) to remove  all the rust. Adjust the clamp to be able to reach every part of the crowbar.   

The process took about 10-15 minutes for the crowbar in the picture (35 cm long). 

Step 3: Optional Sharpening and Finish

Afterward I used a simple file to sharpen the ends a bit. They should be pointy, not knife edge sharp!
If you have a grindstone, that can be used to sharpen the ends. 

Option finish:
If you are gonna store you crowbar in a moist environment you can use paint or lacquer the prevent new rust from forming. 
Try not to paint the ends, put some tape on the ends while painting. 

DONE, enjoy your old tool for many years to come.