Micro-needling or laser treatment for slightly indented scars on child's face??

Are Micro-needling & laser treatments safe for an 8 year old please? Which would be the least painful, less side effects? The scars are from fingernail scratches which are slightly indented (I have posted previously about these). I am willing to travel from the UK to find a specialist that can help me in these areas as these scars are stubborn and are still not improving. (the newer scars are now 16 months old, but some are from 3 years ago). So any advice would be much appreciated. Thanks