How can you edit simple tubes? So i learned how to create simple tubes. Now i wonder if there´s a way to edit them further and use sculpt mode for example. Using the subdivision surface modifier on a path i can´t apply it. Is it possible to transform the path into a cylinder? I know you can simply create one, but that´s not the point.
You can convert a curve to a mesh 'as viewed' in at least two ways:


Alt+C -> Mesh from curve
In user preferences, under addons, enable 'Corrective Shape Keys', then there will be an operator available for converting this and other types of objects to clean meshes with modifiers applied. In the spacebar menu, it will be named 'Duplicate and Apply All' (I like setting  a shortcut to Ctrl+Shift+D, YMMV)