Metal is inorganic in its pure form since metal do not contain any
organic substances. Damp and dirt on the metal surface contains organic
nutrients, which can promote affections and algae.
Industries has for long time had problems to keep metal facings in good condition. Metal facings and sheets can hold for decades if damp and dust not gives nutrition to affections and if no old affections still remain on the surface spores.
All maintenance and time consuming costs are eliminated during the protection time.