I picked up a used 2011 V6 convertible a month ago and have noticed what appear to be two small stains on the convertible top caused by oil or grease soaking up through the top coming from the convertible top hardware. The stains are about the size of a nickle or quarter and are located on the third ridge from the back on both sides of the car nearest to the convertible top seam that runs along the length of the car. The hotter the temperature outside the more you can tell that the stains are caused by oil or grease as the substance becomes more liquid from the heat and you can feel it on your finger if you touch the spots. Can anybody verify my suspicion that this is caused by lubricant coming from the convertible top hardware?
I have added links to pictures: