Scratched steel can be treated with primer for galvanized metal. Although maintenance of the slats is not normally needed, cleaning with mild detergent is recommended.
Water-based glazed pine
Products in varnished pine must be maintained regularly with alkyd paint. Maintenance intervals approximately 1 time per year. Damage and cracks should be repaired immediately. Touch-up paints in spray packaging are available in standard colors to order.
GRC
Can be cleaned with high-pressure flushing, low water pressure, large distance between nozzle and stone and small flushing angle selected (max. 30º). If the outermost layer of concrete is worn away, the coating will become even more susceptible to impurities in the future. Therefore, cleaning with a brush and water is preferable to the hard abrasion that repeated high-pressure washing entails.
There are also cleaning agents for concrete that has been attacked by dirt and algae and then the concrete can be impregnated, which can also be done when the product is new.
Both normal concrete and fiber concrete are sensitive to hard edge impacts. A concrete product that has been damaged can be repaired with polyester filler, for example the Plastic Padding brand.
Hor dip galvanized steel
Hot-dip galvanized can be touch-up painted with so-called "cold galvanizing".
