Powder Coating



Perforated Metal

Powder Coating is a popular finish for Perforated Metal products, particularly for products used within Architectural applications. Many Perforated Metal materials are suited to Powder Coating including Aluminium, Hot Dipped Galvanised Steel, Pre-Galvanised Steel and Mild Steel.

This coating is a free-flowing, dry powder which is used to create a tough and durable finish, much tougher than conventional paint. It is a thermostat polymer; it is applied electrostatically and cured under heat.

Standard Powder Coating gives a paint thickness of approximately 60 microns. However, dependent on the environment, a variety of Powder Coating applications can be used. For example, in areas with aggressive or extreme conditions, materials can be Powder Coated with a greater thickness (more than 60 microns), as well as undergoing thorough pre-treatment measures. Generally there are two main types of Powder Coating which relate to usage in standard environments and more extreme environments.

Benefits of Powder Coating

  • Powder Coated materials have a thick and strong coating without running and sagging
  • Generally, when a surface is Powder Coated, there is little disparity between horizontally and vertically coated surfaces in comparison with liquid coated surfaces
  • As the Powder Coating’s overspray can be recycled, there is very little waste as almost 100% of the coating is used
  • With Powder Coating, there is less damage to the environment as almost no Volatile Organic Compounds are produced
  • Powder coatings can product much thicker coatings than conventional liquid coatings without running or sagging



  • Aluminium Powder Coating: Generally, Powder Coated Aluminium is finished with a paint thickness of 60 microns. However, for more extreme and corrosive environments a thicker paint finish can be used in addition to thorough pretreatment measures. For products in an extremely aggressive environment, the product may be finished with two coats – a base powder and topcoat
  • Hot Dipped Galvanised Powder Coating: Dependent on the environment, a range of options are available including one, two or three coat finishes
  • Continuous Galvanised Sheet Powder Coating: This is suited for a range of environments, from more benign to more extreme conditions. To reflect this, a range of options are available including a one coat finish and a two coat finish
  • Mild Steel Powder Coating: Perforated Mild Steel can be Powder Coated in a two coat finish


Please Note: As Graepels products are perforated, we often recommend a two-coat finish. This is due to the number of ‘edges’ in a Perforated Metal Sheet which can reach many hundreds of thousands. This gives the best long term finish and heightens the durability of the finished product.

Project Gallery 

Check out some recent Architectural projects below in which Powder Coated Perforated Metal Panels were used


Talk to a member of the Graepels team today to discuss your requirements

Please refer to our Terms & Conditions for detailed information. Graepels do not finish materials in house, however, Graepels work with finishing companies that are quality assured and work within industry standards.