Removing Excess Material
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2018 Porsche Cayenne, 2017 Porsche Cayenne, 2016 Porsche Cayenne, 2015 Porsche Cayenne, and 2014 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.
Remove most of the excess material with paper or a cloth.
Finish cleaning visible surfaces with a cloth soaked in acetone.
Hardened material can only be removed mechanically.