Customers often bring us powder coated cam covers they have purchased on the internet. For their Triumph Stag.
We always advise that powder coating is not the best way to refinish these items, as unless the flame trap is removed before shotblasting (an essential part of powder coating) the flame trap will become impregnated with abrasive medium. The consequences of this being washed from the cam cover by hot engine oil into the engine is rapid wear and imminent failure of components.
We have seen this in as little as 40 miles after fitting by a DIY owner.