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If your using Otto (do you mean Ospho) Thats a sure way to get things screwed up....I use it on every car I do and theres a whole proceedure to follow...if its not followed to the letter you will almost certainly have trouble down the line...Dont get me wrong ,its great stuff and it'll most certainly prevent the metal from surface rust for yrs to come,but you really need to know how to use it properly....Its not very hard to use but theres a few things to watch out for...
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