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      01-18-2015, 03:39 PM   #15
wildcatcrazy
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Drives: E90 335i
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Quote:
Originally Posted by Stresspuppy
If you walnut blast to get the hard nasty stuff cleaned up, would it make sense to then do the chemical at some reasonable intervals to keep the hard stuff away?
It may help, but I think the target mileage to have it done again would be 45-50k.