Old steel caps dug out from the ground are very fragile, so we must be very careful with them.
- Dust is cleaned.
- Rust is cleaned by special antirust liquid Zincar. The result after the first hour.
- After the second hour...
- Next I used polish wax "Dursol" (it could also be "Autosol") and special soft cloth.
You can get a result close to ideal if you spend more time.