Lisa's corten steel outdoor wall art collection is cut from premium quality 3mm corten steel and made here in New Zealand. Corten steel is an architectural rusting steel that is designed to rust. It has a copper content that ensures its core will not deteriorate and it will last a long long time. The patina that slowly forms on the outside makes it stronger and it continues to look more fabulous the more it ages.
It takes time, with exterior exposure, for the rust layer to completely form and seal. Corten seals and fully weathers best when it is repeatedly exposed to moisture and then allowed to dry. During this time, depending on the climate and where your art is placed, your work may bleed and have a slight rust runoff. Generally this is if the art/sign is touching a surface.
If this is an issue, Penetrol (available from hardware stores) can be applied and will seal moisture out and help prevent rust stains and further corrosion.