You are correct, we don't have a section on sculpting, but perhaps we should.
We do have some sculpting guides in the Tomes of wisdom, located in the header menu at the top of the page but not specifically on weapons.
Personally with blade weapons, I tend to use brownstuff over a small wire armature. Brown stuff is easier than green or procreate as it sets rock hard and is easily filed. The downside is it can be brittle which is why an armature is a good idea. Plastic sprues can also be filed down to make weapons.
In the meantime check out this thread which may help you find what you are looking for:
http://www.one-ring.co.uk/viewtopic.php?f=30&t=17239&p=241888#p241888