if you having the arches done i would spend a bit more money and buy the ones off little bird on ebay
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, very good quality and a spot on fit
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.
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to stop any more rot have the full arch removed and the rubber seal between the inner and outer arch completely
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taken off
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, this causes the rot in the first place.
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if you just have sections of rusty arch cut out and replace with metal you are wasting your money as the seal still remains and the rust will come back 100% guaranteed.
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gary