shipPath="~/Dropbox/SOYL/From Erik Y/SOYL_meshPrevis_shell_obj/SOYL_meshPrevis_shell_v001.obj";
ship=Import[shipPath]
normals=Import[shipPath,"VertexNormals"];
Graphics3D@Point@normals
Graphics3D[{Point@normals,Line[normals[[FindShortestTour[normals][[2]]]]]}]
Graphics3D[{Red,Point@normals,Blue,Line[normals[[FindShortestTour[normals][[2]]]]]}]
polygons=Import[shipPath,"PolygonObjects"];
Graphics3D@Module[{center=Mean@Map[Mean]@polygons[[All,1]],polyCenter},Map[Polygon]@Map[Function[points,polyCenter=center-Mean@points;(#*Norm[center-polyCenter])&/@points]]@polygons[[All,1]]]
Graphics3D[{Arrowheads[.01],Module[{center=Mean@Map[Mean]@polygons[[All,1]],polyCenter},Map[Arrow]@Map[Function[points,{center,center-Mean@points}]]@polygons[[All,1]]]}]