Powder coating wheels: What is it and how does it work?
A glitzy powder paint job
If you are considering getting your alloy wheels completely refurbished, a powder coating, rather than a traditional paint and lacquer approach, is one of the options available to you in the marketplace. There are a few different reasons why you might choose this finish, but first let’s look into what it actually is.
What is alloy wheel powder coating?
Alloy wheel powder coating is sprayed on like traditional paint, but it settles on the surface dry rather than liquid. It’s not until the coating is heated treated that the paint “flows out” of the coating and forms a gel over the surface of the wheel. As with a standard re-spray, car bodywork repair or car scratch repair, powder coatings need to be lacquered over the top to protect against UV damage, light scratches, pollution and wash swirls.
Applying the powder spray (Image Credit)
What are the pros and cons?
Many sources will tell you that powder coating provides a harder and more durable finish than a traditional re-spray, but equally you might find powder coated rims accused of softening the underlying aluminium. It’s like most things in car repair – it all comes down to the quality of the finish. If the wheel wasn’t properly cleaned or heat treated, to remove gases from the pores of the metal, you might find bubbles breaking the surface of the final paint job. Likewise, if the powder has not correctly flowed out to its gel form, or there has been no protective lacquer added over the top, you might find that it’s more susceptible to scratches and chips. There’s an interesting discussion of the pros and cons of the different finishes here.
It's also possible to achieve more specialist finishes with powder coating - see the purple glitter finish at the top of this post and in this board on Pinterest.
However, you should note that if you need a repair to powder coated wheels, it’s not possible to use the SMART repair system to fix minor scratches and cuts and that long term maintenance restriction could make things slightly more expensive and less convenient for you.
There’s some argument to say that powder finishes are better for the environment because they don’t contain the same solvents as liquid paint and release fewer VOCs (volatile organic compounds) into the surroundings.
The process for powder coated wheels
- Remove the whole wheel from the car. As this is a full refurbishing, the wheels need to come off so when powder coating wheels you should get them rebalanced when they are replaced
- Manually clean and degrease wheels with a specialist wheel cleaner
- Sandblast to remove and loosen tougher particles
- Manually sand the wheel to get rid of the trickiest grime
- Go over the wheel again with a cleaner / degreaser and a brush
- Heat the rim in an industrial oven to release gases that could cause flaws in the final finish
- Apply the powder coating with a specialist spray gun
- Return the rim to the oven until the powder starts to run out to a gel like consistency over the surface of the wheel
- Apply lacquer and heat treat to set
Should I choose a powder coating for my wheels?
If you are looking to completely recolour for cosmetic purposes, or the wheels have sustained substantial wear, tear or rust all over then powder coating your wheels might be a good choice. Be sure to do you research, get references and see previous work and ensure that the garage will complete the service from wheel and tyre removal to rebalancing. Wheels with structural damage should always be written off instead of repaired, for safety reasons.
Please note that ChipsAway do not repair wheels which have been treated with a powder coating, nor do we offer a powder repair service. If you have a minor scratch to repair, ChipsAway can carry out alloy wheel repairs through our tried and tested techniques, without removing the wheel. Check out this blog to find out how our alloy wheel repair works.
We only treat the damaged area, carefully matching the colour and resealing it to ensure a fully blended finish that comes with a lifetime guarantee. For the average motorist who takes pride in their car, this is a highly effective, quality and cost saving procedure to restore the looks of your car.
To find out more about our approach to repairing alloy wheels and to find out if this is suitable for you, browse the services section or fill out the online form to have your local specialist call you back today.
Stone chip repairs: Tips to fix car paint chips
21 April 2017
Car scratch remover tips - How to fix paint scratches
What is vinyl wrapping for cars?
Car wax reviews: Which is the best car wax?