No argument from me on that Space Sailor. Yes, a lot of scrap metal and household items collected to help the war effort from the patriotic citizens of the UK, and USA, was able to be melted down and reused to alleviate the shortage of raw material. But facilities for recycling in WW2 Britain were not as efficient as they are today and relatively little of the aluminium used for cans and domestic utensils was high enough grade to be used in aircraft production. The inspirational "Turn your Pots and Pans into Spitfires" slogan was used because it fired people's imagination, not because it was necessarily 100% true. (Yes, governments lied to us even in those days!) As a war baby (born 1941), I've long had an interest in WW2 history and come across many historical references and books in relation to the scheme, which was introduced by Lord Beaverbrook, Minister for Aircraft Production (1940-41) . A good starting point for anyone interested in a bit of myth-busting would be Scrap metal drives in WW II - Straight Dope Message Board .
-Mike