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A question that is often asked is, "Can an aluminum wheel be powder coated?". The simple answer is Yes. Countless wheels have been powder coated and driven on without issue.

However, whether or not an aluminum wheel should be powder coated has been the topic of some internet debate. No doubt the subject is full of rumor and conjecture, sparked by a relative few wheel failures subsequent to having been powder coated. Here we will attempt to make your decision a little easier by bringing some facts to the conversation.

While some manufacturers will void the warranty of a wheel if they are powder coated, countless OEM and aftermarket wheel manufacturers already choose powder coating for their preferred finish. The list of which includes some very high end and prestigious names (unfortunately for legal purposes; we can not name-names).

The debate seems to stem from the possibility of wheel failure after going through the powder coating process, and whether or not the heat required to cure the powder coating is enough to damage or weaken the structural integrity of the wheel. Usually the debate is focused directly on aluminum, not steel because aluminum anneals or "softens" at a much lower temperature.

Aluminum anneals at around 650°F
Steel anneals at a much higher temperature (1300°F)

Standard powder coatings cure at temperatures that range from 350°F-400°F. The time spent at these temps (Part Metal Temp) averages about 10-20 minutes. This is far below the 650°F needed for the aluminum to soften.

In fact, there are aspects of part preparation such as the blasting process, which may be more of a hazard to aluminum than the curing process. Depending on what kind of media is used, the blasting process may result in a degradation of the substrate.

OEM manufacturers must consider these aspects, and issue such warnings against modifying their products (including the finish) to protect themselves from liability and litigation.

You too must consider the facts and possible risks to decide for yourself whether powder coating wheels is something you want done, but always consult a reputable powder coating shop when having your work done.