If you put a nose mask on, a couple things you should know:

1) The paint under the mask will not age since it is covered. If you live in a sunny area, a few years with the nose mask on, when you take it off, it will look brand new while the rest of the car has faded somewhat.

2) Make sure that the car is absolutely clean before installing the mask. If you get any dirt trapped underneath, it will scratch the finish up.