Just a tip... If you install clear vinyl make sure the surface to be applied is really soaked down good with a water/soap solution. Translated means 1-2 drops of liquid dish soap to a full spray bottle of water. Then squeegee the heck out of it to get water and air bubbles out.
Installing clear can be problematic, and it will show lines, bubbles, etc easily if you don't wet down the surface prior to install.
Also make sure you oversize the clear vinyl alot. It will retain fingerprints on the adhesive side, so you want to handle it outside of the area to be applied.
otherwise hire some sign shop to install it for you.