nothing conclusive. I used Rejex on my Passat and it has stood up to the tough winter we've had here in RI.

It can also be used on your windshield and rims and the water still beads off everything!

 

I put Rejex on my rims...........and will on my tail pipes/rear end of my car. The rest will get Zymol............reason for that is I will probably run a test pipe. REALLY MESSES up the back end of the car and the pipes get yucky really fast!!!

Hopefully this stuff will help with that. I will let you guys know how it holds up.