(How to) Wifi Dish Antenna (part I)

Ever wanted to build a wifi antenna out of a satellite dish antenna?

It all started with a donation of this dish, old, forgotten and rusty.

I teared all apart, sanded and grinded all rust away.

Bought this spray can:

This is the result after painting:

This is the antenna link I am basing my idea. Also look at this links:
Really cool explained
Perfect Explanation of biquad