As a detailer I personally wouldn't recommend a car cover at all. The only time I feel they are any good are for a freshly washed vehicle that has absolutely no dirt / dust on it. My reason for this is that if you put a cover over an even slightly dirty vehicle and there is any movement of the cover it will cause slight marring ( scratching ). The more times the cover is removed and placed back on the more dirt / dust that will be retained within the cover and therefore induce more marring the next time it is placed back on.
That's my 2c and am happy to be proved wrong
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