How to make 3d scanned structure into solid or surfaces?

hey guys , so I’m currently working to make this 3D scanned structure into solid or surfaces, I’ve tried to trace on the scanned curves but it doesn’t seem to be so accurate. Are there any alternatives or plugins you guys could recommend ?

I’m assuming yu have the 3D canned surfaces as a point or mesh file.

How have you tried to “tried to trace on the scanned curves”?

How are you determining accuracy? How accurate do you need to be relative to the size of the objects?

How smooth are the objects? Are there any kinks?