Originally Posted by
Redbullet
I'm trying to recover the damage and get a reasonably safety assurance up to the level you get when you buy a carbon bike from a reputable company.
"Reasonable" safety assurance is going to be a matter of personal opinion - everyone is going to have a different threshold. If you're comfortable with someone visually inspecting it and/or tapping on it with a coin or something along those lines, go for it. I don't personally think that anything less than getting it scanned is going to be as reassuring as a factory-new bike, though (but I wouldn't necessarily need that level of reassurance, either - it depends).