I would certainly look at silica, because it reabsorbs scartissue. But I would not use a low potency, because, if there is anything left, it could restart another cycle of keloids. I would use infrequent doses, alongside any constitutional remedy. say two doses -sufficiently spaced of course - of the constututional and then a single dose of Silica, repeated two doses of the const. later. Then after 3 doses I would leave it alone and see again in six months about the scars. If any left, I would repeat with the 10m.