I read the how to for fitting a grill to astra j. What about fitting one, particularly the steinmentz grill to a gtc with afl? how easy is the process of removing the front bumper? this aftermarket grills are installed with glue(i have a steinmetz pdf with fitting instructions but it is in German). How can you remove it later if you want? Will the glue cause any damage to the bumper? I can upload the pdf if anyone wants it.