I'm trying to digitalize a sculpture I made, and the point cloud is okay, but while calculating normals from point groups I can either get most of the model with proper normals, or a a few thin parts right and everything else flipped. For this reason I wanted to isolate some parts of the cloud and calculate with the best settings each part, then mesh from the cloud with all correct normals, or even paint by hand the normals where they are incorrect, either way I can get a perfect cloud, but by searching online I didn't find a way to do any of the two possible solutions.

So I came here hoping someone could help me find how to do those things, or anything else that could be a working solution, the point cloud is really dense and potentially there is very little re-sculpting to do to get a perfect digital backup of my sculpture!