We strip, blast and paint quad frames with powder coat

Windridge Coatings for powder coating motor bike frames

With thousands of internet searches a month ending at Windridge Coatings we have become one of the best known powder coaters for repainting the best bike frames. With meticulous attention to detail we are able to achieve the quality finish previously only available with liquid paint. Blasting and powder coating is not the whole story this page will explain why.


Powder coating is resistant to sand blasting

Who should use Windridge Coatings

Owners who do not want a quick cheap job but those who need to be reassured their precious quad is going to be looked after and worked on with care and interest. Every body admires a machine with a good paint finish. We are used when only the best is good enough, for the perfectionists who rebuild their quads and demand and outstanding finish.


The Tri-Resin System

An advantage of using an architectural powder is the depth of knowledge and facilities for protecting steel for at least fifteen years in all weathers.

Coupled with a background of spraying quality cars, achieving a good finish for Windridge Coatings is second nature. The Tri-Resin System incorporates the best practices of corrosion inhibitors, liquid painting and powder coating. It is the way of the future for powder coating and your quad frame will look good and be better protected for it.


Powder coating looks good is tough and corrosion resistant

Not all machines are gently ridden and spend most of their time being polished. Our powder coating is applied to work hard and give good corrosion protection with resistance to chipping. Powder is hard wearing.


Powder coating is tougher than two pack polyurethane

Two-pack polyurethane is probably the toughest of the wet paints but it is not as good as well-applied powder coating.


What is the difference between two pack polyurethane and powder coating

What is the All paints are made of pigment, resins and extenders. With wet painting solvents are used to dissolve these into a liquid paint easy for application but with powder coating there are no solvents; the heat is used to turn its ingredients into a liquid. When both are cured the average person would not be able to tell the difference between the two finishes. See below.


How to present your frame for powder coating

Please present your frame with all brackets, fittings, bearings, grease and road dirt removed. Some modern bike frames are powder coated which is difficult to remove without damaging your frame with excessive blasting. To thoroughly clean your frame of existing paint and contaminants a controlled pyrolisis oven is used prior to blasting this will also remove any rubber or plastic left fitted.


What we do to your frame

The following will show the different stages of processing your frame will go through at Windridge Coatings.


Removing paint and grease

The old paint and all grease needs to be removed from the frame or it will spoil the new powder coating. Blasting alone cannot do this and any grease left, will run over the new paintwork when the frame is heated. The controlled pyrolisis process we offer is not used by many of our competitors. It is a special oven that carefully heats the frame to about 400 degrees Celsius to turn the paint, grease and any other contaminants into ash. Heating the component slowly and evenly avoids distortion.


Pyrolisis semi anneals the frame to relieve internal stresses and reduces cracks

Heat treatment has another useful advantage with semi annealing the frame to reduce internal stresses accumulated by years of hard riding. The metal becomes work hardened, which leads to metal fatigue and is the cause of frame cracks. See ‘Fatigue crack inspection’ below.


Grit blasting quad frame

To remove the ash Windridge Coatings grit blast quad frames. Grit blasting sometimes referred to as sand blasting or shot blasting removes the surface of the metal including rust. To reduce the amount of blasting so as not to weaken the frame we always remove paint first either by incineration or paint striping. Especially on modern frames that are often powder coated and is difficult to remove by blasting alone.


Corrosion inhibitor

To reduce the likely hood of the frame rusting under the paintwork a corrosion inhibitor is applied. This is an architectural metal pre-treatment process used to seal the metal after blasting. A concoction of chemicals passivate the metal combined with a low viscosity paint ensures no metal is left uncoated. Around brackets and the air pockets under the powder coat which can be the starting areas for under coat rust creep. This is an expensive process that would not normally be used on quad frames.


Fatigue crack inspection

Grit blasted frames are checked for fatigue cracks prior to painting.

This was part of a TT sidecar that was condemned because we found a number of cracks through out the frame, all of which would not have been seen with out our inspection.


Powder coat Primer

Priming a motorcycle frame is very important, as it is the waterproof barrier. Polyester powder coat on its own is not sufficient protection on steel against corrosion. The primer is expensive and most powder coaters will leave out this stage because the customer cannot see it. Not only will it prolong the life of the frame against rust but it also produces a smoother finish. A knowledgeable powder coater must apply the primer or the paint will be prone to cracking.To avoid the frame number being lost Windridge Coatings masks the serial number at primer stage. Depending on how prominent the number is we may not powder coat over it all but lightly wet paint.


Perfect paint finish

We use one of the most expensive black powders on the market to give you the deepest glossiest black. Treat it like any other paint, wash, compound and wax and it will last for decades.


Powder coat testing

Windridge Coatings often gives talks to bike clubs and exhibits at bike shows. To prove powder coating is tough and not brittle when applied correctly, sample panels are tested by impact with a 2lb ball pein hammer. The testing is carried out in front of an audience who are always impressed with our confidence.


Tests adhesion, curing, quality of paint

This simple field test is based on a BS3900-E7. If the domed paint exhibits cracks, it can indicate poor key, dirty metal i.e. grease under the paint, inadequate curing or poor quality powder, which can be brittle. This means the paint is likely to chip during use, paint will crack under pressure from bolts and paint cracking with flexing of the frame, all of which will allow moisture to start rusting.

Impact must be free of cracks


How much does it cost to powder coat a motor bike frame

The price to powder coat a standard frame with or with out swinging arm, in black is £135 +VAT.

To help you estimate prices for your components here are a few examples:

  • Main stand: £15 +VAT
  • Side stand: £12 +VAT

Other colours are available, approximately 100 to chose from, please allow an extra £10 for other flat colours or £25 extra for COMET DUST metallics.

For a comparisons between stove enamel and powder coating, click this button: more