Teflon coating on George Foreman?

I have a George Foreman Grill with Teflon coating on the top and bottom heat surfaces (black coating), but after cleaning the grill with a bristle cleaner, the coating has flaked off, in relatively small amounts (exposed lines here and there where you can see the underlying metal). Is this a potential health risk, now that some of the grills inner metal has been exposed? Will it still grill things properly? And is there a "teflon-spray" that I can buy to replace the surface, without forking out for another George Foreman? Any help is much appreciated, as I have little to no knowledge about this sort of thing! Thanks =)