When I first got my Boxster 14 months ago I purchased the Rag Top kit with cleaner and treatment. I followed the directions exactly. The treatment did not seem to hold up very long, after a couple of months water stopped beading on the top. I then went to Nanodyze product...water still beads a year later
Nanodyze 16oz Fabric Protector Stain Proof Preventor Waterproof Car Baby Seat | eBay
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Dwight