Thanks for replying, though I'm still unsure as to a good metal. The site mentioned with 'usable' swords lists 1050 High Carbon Steel. Is this what is commonly used?

As well block was indeed a poor choice of words, I should know better than that from bokken practice

I would like to try an iaito class, but right now it conflicts with Kung Fu practice. And I don't think there are any Shinkendo dojos where I am right now. Though thanks for the tip as one day I may move somewhere where there are.