NOTHING removes a scar. There is NO such method or cure yet and if somebody advertises it - you are being lied to. I suspect someone is trying to make money by claiming that smearing "stem cells" on a scar would give you a miraculous cure.
A scar is permanent. The best we can do is operate on a scar to "revise" it and make it more acceptable but we no dot have the ability of making scars vanish.
Dr. P. Aldea