My garbage disposal (2008 InSinkErator Evolution Compact) started leaking today because the rubber of this part that connects to the tail pipe split open. I pulled it off and noticed this on the inside of the disposal. I know nothing about disposals, but that doesn't look right to me -- so before I go through the effort of trying to fix it, is this the sign of a greater problem and should I be replacing the entire disposal?
This is the first issue I've had with the disposal in the 2+ years I've owned the house -- so will cleaning it up and replacing the part be enough? More photos of disposal here.