Full video for funs of restoration :D
On occasion, I got a brutal warning siren that had lain in the spare parts warehouse of a Soviet underground bunker for several decades. The body is cast from cast iron, which is why the siren is wildly heavy: with external dimensions of about 20 centimeters, its full weight almost reaches 9 kilograms! This is a short film about the restoration of this object. You can watch the full version on my channel.

Tools that I use most often:
1. Multifunctional machine with flexible drive:
https://s.click.aliexpress.com/e/_eO6ibA
2. 220 or 110 volt Soldering station:
https://s.click.aliexpress.com/e/_ePOcK8
3. Engraver with flexible shaft. Large set
https://s.click.aliexpress.com/e/_eNqWAS
4. Battery powered impact screwdriver with a monstrous 300nm torque:
https://s.click.aliexpress.com/e/_eKCf8Q
or this one
https://s.click.aliexpress.com/e/_eNSxTu