Protection tape can be used to protect your helmet from damage on the chin guard as well as the front part of the helmet.
Just cut the tape out to the shape you want, you can use a paper template first, it's easy to cut with a sharp pair of scissors
Click on the photo's for full size
You will need Gloss tape for this helmet with the normal laquered finish
You will need Matte tape for this helmet with a Matte black finish