Our sealed products will be more resistant and not as susceptible to changes with the patina, as a sealant has been applied to the metal during production.
A natural finish or unsealed metal will change and adapt depending on each metal's tendency. Different temperatures and weather conditions can generate different reactions with the metals. For example; stainless steel stays relatively the same, copper naturally turns brown and eventually green due to oxidation, and zinc and brass develop a more rustic and subtle tarnish.