Blast Surface Preparation

Every job we undertake goes through a rigorous pre-treatment process. Surface preparation is a key element in delivering a wonderful finish.

Our G12 Iron-Grit blasting is completed to the SA3 industry standard providing the best possible surface finish.


Electrogalvaning or arc-spraying is a process, which protects and greatly extends the life of a wide variety of products in the most hostile environments and in situations where coatings are vital for longevity.

Powder Coating

Powder coating is the technique of applying dry paint to a surface, it’s electrostatically charged and sprayed onto the product.

During the curing process (in the oven) a chemical cross-linking reaction is triggered by the curing temperature and it is this chemical reaction that gives the powder coating many of its desirable properties.

Welcome To


Blast Surface Preparation

To achieve the superior level of finish regardless of whether an item is powder coated or wet painted. We blast clean every item utilising our specifically selected

G12 Iron-Grit, as we believe this product delivers the best results and conforms exactly to the SA3 Industry standards. Additional Iron-Grits can be sourced should you feel that your project requires a different abrasive coarseness.

Using the latest equipment housed in our state of the art blast room, our skilled craftsman are able to carry out preparation on everything from removing severe rust on a car shell or motorcycle frame, preparing a structural steel beam for an agricultural coating, right down to a more gentle light blasting which is required on aluminium surfaces.



Electrogalvaning or arc-spraying is a process, which protects and greatly extends the life of a wide variety of products in the most hostile environments and in situations where coatings are vital for longevity. The variety of metallised coatings is vast but can be broken down into two main categories. These include finishing coatings, such as anti-corrosion or decorative coatings, and engineering coatings such as wear-resistant and thermal barrier coatings.

All methods of thermal spraying involve the projection of small molten particles onto a prepared surface where they adhere and form a continuous coating. To create the molten particles, a heat source, a spray material, and an atomisation/projection method are required. Upon contact, the particles flatten onto the surface, freeze and mechanically bond, firstly onto the roughened substrate and then onto each other as the coating thickness is increased.


Powder Coating

After pre-treatment, the metal is suspended ready for the spray booth and coating. The powder which is held in a fluidised hopper bed is carried to the spray gun using compressed air. Powder coating is based on the principle that objects with opposite electric charges (positive and negative) attract one another. Powder particles are negatively charged by passing them through the arc-spray gun. This results in an electric field between the spray gun and the earthed component. The powder particles then follow the field lines and adhere to the product.

The component is then conveyed to an oven where the powder is baked at a temperature of 160 to 200 degrees C for approximately 20 minutes.  Most conducting or thermally stable materials are suitable for powder coating and metals are particularly good due to their high electrical and thermal conductivity.  Complex metal components can be powder coated evenly with excellent adhesion.


RAL Colour Chart

RAL is a colour matching system used in Europe. In colloquial speech, RAL refers to the RAL Classic system, mainly used for varnish and powder coating but nowadays there are reference panels for plastics as well. This site displays a review of standard colors according to the Classic RAL System. RAL is used for information defining standard colors for paint and coatings. It is the most popular Central European Color Standard used today. The colors are used in architecture, construction, industry and road safety.

The British Standards

The British Standards for colours are the standard colours (National Standards Body) in the United Kingdom, which is incorporated under a Royal Charter. The standard colours are used in identification, coding and other special purposes for building and decorative paints.

The most used British Standards for colours are BS 381C, BS 2660, BS 5252 and BS 4800. The “Full British Standard colour fan” is available exclusively from this site to represent the Britsh Standard Colour range where every effort is made to match the BS colours (475 colors) as closely as possible.


SW Powder Coating Ltd loves chatting to its clients, discussing new projects and establishing how our services could help realise your ideas. Please get in touch with our professional team, we’re here to help, so call us today on 01295 262999 or feel free to utilise our contact form and send us a message. Hope to chat soon.

Contact Us

Where To Find Us

SW Powder Coating LTD

Unit 1, Thorpe Close
OX16 4SW

T: 01295 262999
E: [email protected]

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