[Arran]

Yuck; it looks like someone used a rusty nail as a paint removal tool! It's a tough call, you could wet sand the more or less flat areas but those scratches in between the grill bars is a much more difficult task, you would have to make a tool to wrap the sandpaper around to get in there, like out of an old popsicle stick. I think that a combination of a high bodied sand-able primer and some glazing and spot putty might help with most of it. In any event the Bakelite looks like it pure black, so you could paint it over it in black if you like that look.
Regards
Arran