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This was my response to this very subject on another thread:
Having read this report in the past, and again just now, I continue to be simply amazed by these two early paragraphs:
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Consumer Reports found that the liquid waxes generally provide the best combination of cleaning and protection. But contrary to conventional wisdom, they required more effort than paste waxes to apply and remove. As a group, liquids were the hardest to apply evenly, and they took the most time to buff out.
In addition, some left a powdery residue that had to be wiped off. Even the top-rated Black Magic Liquid Wet Shine Liquid Wax (BM48016) required an extra bit of buffing to eliminate any streaking. And CR’s other best all-around choice, the Turtle Wax Carnauba Car Wax T-6, can cause slight scratching or hazing on newer dark-colored finishes.
A wax does not produce more cleaning ability simply because it's in liquid form rather than paste. Some companies make cleaner waxes both ways, and straightforward waxes (that is, with little or no cleaning ability) both ways. You just can't make blanket statements like that. Unless, of course, you chose - by chance or intention - cleaner waxes in liquid form and straight waxes in paste form. But that wouldn't be a real "test" either.
And that second paragraph: "Turtle Wax Carnauba Car Wax T-6, can cause slight scratching or hazing on newer dark-colored finishes" is just astonishing, and very telling of the lack of understanding on the part of CR. First off, how the heck do you rate a wax a best all around choice if it leaves scratches in the paint? Oh, and someone should tell CR that if in fact it does leave scratches, it's leaving those scratches in the clear coat, not the color coat. So, if in fact it does leave scratches, it isn't leaving them only on dark colors, you just can't see them as easily on lighter colors.
From these two paragraphs alone the article lost all credibility with me. And for the record, I don't use expensive boutique polish and wax on my car. From these two paragraphs alone the article lost all credibility with me. And for the record, I don't use expensive boutique polish and wax on my car. Get your technique down, use the proper tools, and you will get an amazing shine using any decent line of product.
Further, regarding CRs testing protocols, I remember a stereo speaker comparison years ago where they judged all speakers using the exact same placement relative to floors and walls. This might sound fine, but it totally disregarded the manufacturers recommendation for placement. Anyone who knows anything about stereo speakers knows you can alter the sound quite a bit by placing them in a corner, or on a shelf, etc. For someone to judge speakers while ignoring recommended placement is just plain stupid.
Or their condemnation of the handling of the Dodge Omni when it first came out. Remember the protocol there: Bring the car up to 50mph, throw the steering wheel 90 degrees and let go, all while maintaining a speed of 50mph. The poor little car did not return to it's original heading and so was condemned as "unacceptable" due to its poor handling characteristics. That relates to real world driving and handling how? Road & Track Magazine came to the little econobox's defense by stating that it could outrun a (then) $45,000 Maserati Khamsin sports car through a 700' slalom course. Unacceptable handling indeed.
Time and again CR has shown a total lack of understanding of the products they are testing, and for this alone the publication has no credibility whatsoever in my eyes.