FlowScape nicely imports ..OBJ meshes and handles them quite well.
Except when saving a scene containing imported meshes.
If you import a mesh into your scene an decide you did not want that mesh and delete it and saved the new scene, FlowScape does not remove the mesh from the scene and the mesh is right back in the scene when it is re-loaded.
I have not found a way to remove unwanted imported meshes.

The above does not apply to the built in FlowScape objects.