There doesn't appear to be a crack as such to the rim and is a gradual thing rather than a sudden failure so reckon you'd be okay but like above, get a file to smooth down any edges. I think you could use a metal filler putty if you really wanted to. http://www.wickes.co.uk/metal-repair-epoxy-putty/invt/243792/?source=123_4
There doesn't appear to be a crack as such to the rim and is a gradual thing rather than a sudden failure so reckon you'd be okay but like above, get a file to smooth down any edges. I think you could use a metal filler putty if you really wanted to. http://www.wickes.co.uk/metal-repair-epoxy-putty/invt/243792/?source=123_4