When the welding is finished and the wheel cooled, we manually reshape the rim using files, abrasive paper and a big dollop of skill. We then paint it with a quality grey primer to give the area some protection from the environment.
You should note: Alloy wheels and their manufacture is a very skilled process and precise production sequence. Wheels are often cast, rough machined, heat treated to a very accurate schedule (you can look this up on Youtube) and finally finish machined to a high tolerance. Welding is a heat intensive process, the metal is liquid by definition and this local heat treatment is bound to affect the integrity of the wheel. Heat treated areas will often be a little softer than they were when they left the factory and another pot hole in the same zone can lead to even more damage.
We have just purchased a new Miller 350 Dynasty inverter welding set. This gives us much greater control over the weld conditions, it allows us to reduce the amount of heat input to the work and less heat input means less distortion. We are getting great results from this new technology too.
Call us on 01372 272380 for your alloy welding needs.