I had run out of this product last summer and tried another brand and it didn't work. This 3M product works great to keep our 10 year old boat vinyl looking brand new. Only took a couple of times to get the lustre back and remove some hard to remove spots.
I bought this stuff when we bought our boat to clean up the vinyl and it didn't do jack. The seats looked exactly the same before and after use. We then bought Spray Nine and it worked great! I highly recommend it!