
I have used Renovo Cleaner and Ultra Proofer on my BMW 3 Series. The 500ml bottle only lasted for the top part, leaving a few tablespoons (20ml or less). The top used to soak up water, but now it bubbles up. From the morning I was able to clean the top with the first product, mask the car and start applying the Ultraproofer. I left it in the garage for about 12 hours and drove on the next morning. If there's one thing I can recommend, it's to use plastic instead of newspaper to wrap the car. The ultra corrector is absorbed into (through) newspaper. The product did not change the look of my black top, which was a major concern for me. After doing this, I will do it again. As they recommend, I'll redo it closer to winter to protect the top from salt spray.

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