I worked in auto for many years. This is probably vinyl. Vinyl is made with plasticizers to make them soft for auto interiors. These migrate through the vinyl to the surface over time. This is called blooming in the industry and vinyl is well known for it. Ever wonder what that new car smell is?Thank you all for the replies. Some of you have good reading comprehension, others I fear have been failed by our public school education.
As originally stated, the truck is over a year old and it never had anything applied to the steering wheel. Heck, I don’t even touch the airbag cover with my hands. They are on the wheel of the steering wheel in order to steer! I’m going to go with your suggestions that it is a substance created by the manufacturing process that was then affected by heat, light, temperature and humidity. Interestingly this discoloration was on the backside of the cover as well which rules out transfer from my hands or a chemical applied without my knowledge. Furthermore, this supports the manufacturing theory
I also took other’s advice and cleaned it with soap and a damp cloth.
It cleaned right up.
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Without plasticizers your shower curtain would be as stiff as PVC drain pipe. More or less if the manufactuer chooses vinyl this is going to happen.
After vinyl looses it, it becone stiff and more brittle. This is why old cars have cracks in the vinyl.
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