Needle Felting Q...(Hildie?)

Okay, I’m felting my gajillionth pair of clogs and what is totally frustrating to me is that I can felt and felt and felt and the clogs shrink by 200%, and yet there are still visible stitches. I don’t want visible stitches, I want them to look all smooth and felty.

So my question is: I have some felting needles…would needle felting be a way to get rid of the visible stitches without shrinking them further?