Wax on Fenders

Last May I told you about waxing my Jeep and getting some wax on my black plastic fenders. 

Wax on Fenders Blog Post

There were several suggestions on how to get the wax off the fenders. I tried several of them. One was to use peanut butter. It looked liked it worked. BUT IT DIDN'T! The wax is back and now, to me, it looks worse. 

I am at a loss on how to get rid of it. I might try a blow dryer and wire brush this weekend. However I did find this... Mothers Back-to-Black Heavy Duty Trim Cleaner. It states restores dull, faded exterior trim & plastic. Naturally clean finish not a cover up.

I am a little nervous about using it. Has anyone used it before?    

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