In the US, metal barrels are not used for watering, but for collecting rust.
Timur Khomichev USA US News metal barrel rust Garden and Vegetable Garden 30 July 2024As a rule, summer residents apply moisture-resistant enamel or bitumen to the inner surface of the barrel, but there is a much simpler way.
Timur Khomichev metal barrel watering barrel watering watering the garden Garden and Vegetable Garden 29 July 2024