You need:
- a car battery charger
- q-tips
- a saturated salt solution
- an metal object to engrave
- masking tape (plain adhesive tape works)
Steps:
![](https://truefork.org/wp/wp-content/uploads/2019/01/136351810616_0-1024x670.jpg)
Cover the parts of the metal object you don’t want to engrave with tape (do one side at a time, because you need a place to make electrical contact).
Mix vinegar and salt.
Clamp the + clamp onto the metal object.
Put a q-tip in the – clamp, so it touches the cotton
Dip the q-tip in the salt solution (do this frequently)
![](https://truefork.org/wp/wp-content/uploads/2019/01/136351810616_1-1024x749.jpg)
Rub the q-tip on the exposed metal, it will start to bubble and foam and get dirty. Don’t touch the metal directly with the clamp, you don’t want sparks
Change the q-tip when it’s become too dirty. Wipe the metal and the – clamp from time to time.
Ventilate your room because the chemical reaction stinks.
Work evenly along your surface to engrave, continue until it seems engraved deeply enough.
![](https://truefork.org/wp/wp-content/uploads/2019/01/136351810616_2-1024x828.jpg)
Remove tape and admire.
![](https://truefork.org/wp/wp-content/uploads/2019/01/136351810616_3-1024x768.jpg)
You can re-apply tape on small sections and engrave it some more if needed.
Some other thing I did with this process:
![](https://truefork.org/wp/wp-content/uploads/2019/01/DSCN3070-1024x762.jpg)