[patrickt]

Believe me, if ERA thinks you need something, they will tell you so. And then they will politely offer to sell it to you or do it for you. Remember, they're in business to make money. But they will not sell you something you don't need. If they don't tell you that you need something, then you don't need it. Forget the undercoating and concentrate on painting your wheels a nice adobe beige color. They're dead ringers for magnesium.