Whatever you used to handle the clay, including your hands, are manual implements, and will leave evidence of their handling. I don't know what you're imagining, but if you're imagining what I think you're imagining, then not only can I identify the figurine as manmade, I can identify the man who made it via his fingerprints.......
Time to modify your imagination. Try again!
=)
Since you were using the term "manual implements" rather than saying hands or implements, I was checking the boundaries of your terminology.
Sorry if you feel distressed my that.