Remove excess material
WARNING: This page is about a different car, the 2010 Porsche Cayenne, 2009 Porsche Cayenne, and 2008 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 cloth. Finish cleaning visible surfaces with a cloth soaked in acetone. Hardened material can only be removed mechanically.