To maintain the good looks of your powder coated aluminium , each surface needs regular washing all over – not just the parts that are sheltered from the rain. In fact looking after your Knotwood finish is very much like looking after a new car – a regular wash keeps your investment in smart condition. Washing with a soft brush and mild pH neutral detergent followed by thorough rinsing with fresh water will ensure that substances such as airborne salts, dirt and pollutants detrimental to the long term performance of the powder coated film are removed. Where the atmosphere is deemed to be non-hazardous such as rural or normal urban environments, cleaning must take place at least every 12 months. In areas subject to high pollution such as industrial areas, geothermal environments or coastal environments then the cleaning frequency should be increased to every three months. In particularly hazardous locations such as beach fronts, severe marine environments or areas of high industrial pollution the period between cleaning should be reduced to monthly.