Can I sharpen lathe tools on this disc?

Hi all I'm new to turning having borrowed a cheap lathe from a mate and I've just bluntened my first gouge and then thought "how the hell do I sharpen this??" I don't have a grinder but there is a disc attachment on the lathe. Is that good for sharpening tools?







Should I glue a hook and loop kit onto it? Or just glue sandpaper to the disc? Do I need metal sanding sandpaper? Is 120 about right? Do I need a jig?



Thanks John.