Another vote for CT18. I use a garden sprayer to apply (like the ones you use weed killer for but I have it marked with black pen for car wash only). I spray it in the wheel arches and everywhere I can reach underneath, including in the chassis rails. I normally don't put it on the paint work.
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I then wash the rest of the car then spray it off last. Awesome stuff and gets a red dust from the Murchison off well!
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I then wash the rest of the car then spray it off last. Awesome stuff and gets a red dust from the Murchison off well!
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