A haven dedicated to manual espresso machine aficionados.
No this is just exposed copper/brass, as Pat mentioned before, i'd just leave it as it is. no need for further descaling, disassebling etc. I would recommend using RPavlis water (100mg sodium/potassium bicarbonate per 1l of distilled water) to prevent scale buildup in the future and also protect your copper heating element.it possible for the machine to rust inside the boiler at the base? And if so, should I take it apart to try and remove it?