"HEY WOL DOnb't leave it in the sunlight too long mate..someone may spot it! ;)"
Yep, silver is one of the BEST reflectors available.... as well as the best electrical and thermal conductor and....
FROM:
http://www.silverinstitute.org/silver_uses.php
"Why is this indispensable metal in such demand? The reasons are simple. Silver has a number of unique properties including its strength, malleability and ductility, its electrical and thermal conductivity, its sensitivity to and high reflectance of light and the ability to endure extreme temperature ranges. Silver?s unique properties restrict its substitution in most applications."
