Drilling out wheel nuts

Andy R · 2006-11-20T09:18:03+00:00

I need to drill out two locking wheel nuts on my car where they've been gunned up so hard by the plank in the tyre fitters that they're damaged and can't be removed.At vast expense I bought a cobalt drill bit yet with plenty of lubricant and cooling it's making very little progress and now seems blunt.Does anybody have any other ideas how to drill this out?TIAAndy R