If your friend is paying for it then just get some quotes from reputable repair shops and go with the one you are happy with. You don’t have to make a claim if you get it repaired properly.
Be aware though that if you speak to mota for advise about it they will mark it down as a claim regardless of whether you actually make a claim or not, I made an inquiry for a friend who had a bad scratch on their scheme car last year and was told they had the choice to claim or repair private but a couple of days later I got a call from RSAM about “my accident” and was I going to put a claim in, after I had stopped laughing I told them I hadn’t had an accident and they said Mota had informed them, I explained it all to them and they insisted I gave the other persons details which I refused on data protection grounds, they weren’t happy but when I asked for this request in writing stating the legal requirement for me to divulge the information they said there wasn’t one.