Great idea with the putty knife. The main sheet works well too, but only if the cams are in good shape.
One the other hand, filling the cam would probably not fall under the "class legal" category. The basic rule in the Hobie Class Rules is, if it's not in the Hobie Class Rules, it's NOT legal. I'm not going to spend time digging through the book looking for this, but if someone finds a rule that would allow this, let us know.
Mike