I used Mother's back to black for quite awhile. Then started using Meguire's natural shine interior cleaner for the inside. By accident I grabbed the wrong rag one day while I was cleaning and used the Meguire's on the fenders. To my surprise it worked just as good as back to black. Now it's all I use inside & out. Lasts about as long, easier to apply, and cheaper.
http://www.meguiars.com/en/automotive/products/g4116-natural-shine-protectant-16-oz/
I couldnt remember what I have tried, but that you for posting this. I tried it and was surprised as well.
once they fade, Bondo 'Restore Black' allow to dry, then apply areospace 303:rock:
it is the shizz, brought mine back from the dead