There's no straightforward reason why a scar would heal/disappear using IGF-1. It does cause a more rapid turnover of epithelial cells, which the cells that make up your skin are, but I'd expect GH to have a bigger impact on this type of thing, if at all. There is a study on wound healing done with LR3. You can do a pubmed search for "Lr3" and "wound healing" it should come up.