Top hit for ‘foamsmithing’: http://sites.google.com/site/varangia2/foamsmithing
It’s a larp website that hasn’t be updated in two years. It ought to be Dagorhir’s weapons forum, Belegarth’s weapons building forum, geddon.org, or nearly anything other than a vastly scattered, unuthoritative list of broken links.
We will try to fix this by distributing our knowledge as best as possible! If you are interesting in helping us highlight the best of foamsmithing on the web, email firstname.lastname@example.org. Thanks!