Do you crochet? If you still want to use a provisional (invisible) cast-on and just don't like the look of an added edging, you can take care of the live stitches with something that's sort of a cross between a crocheted bind-off and a crocheted edging. Unravel the cast-on and put the live stitches back on a needle. Then, for every live stitch, sc (single crochet) in the stitch and then chain a few before doing the sc in the next stitch. You'll get an edge that's scalloped to varying degrees, depending on how many chain stitches you put between the single crochets.
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Do you crochet? If you still want to use a provisional (invisible) cast-on and just don't like the look of an added edging, you can take care of the live stitches with something that's sort of a cross between a crocheted bind-off and a crocheted edging. Unravel the cast-on and put the live stitches back on a needle. Then, for every live stitch, sc (single crochet) in the stitch and then chain a few before doing the sc in the next stitch. You'll get an edge that's scalloped to varying degrees, depending on how many chain stitches you put between the single crochets.