CSSBI Factsheet 33-26: Wet Storage Staining

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Most cold formed steel building products, whether painted or unpainted, are manufactured from a sheet steel material that has some form of metallic coating applied. One of the concerns expressed by installers relates to the presence of wet storage staining on the products, how this staining impacts the long-term performance, and what can be done to remove it. The purpose of this fact sheet is to address some of these issues, allay some fears, and give guidance on proper storage techniques.