If I remember correctly there was talk of a project of upgrading some Mig-21s models with stealth material coating...also talk of working on a stealth fighter along with Russians for joint production.....Anything happened on that front ???
Well there was talk on a forums of giving the Migs & other aircraft a Russian Radar absorbent material (RAM) Coating.Don't know much after that or if such technology is as good as they claim it is.
I think India is yet to decide on which design partner it wanted to join (Sukhoi or Mig) given that the IAF seems confused on what it wants-single/twin engines,range requirements etc.The Russian Government seems to be backing the Sukhoi design which seems to be more or less ready & India may well hitch along for the ride.