I have had great success with the Blair Kit no. 11082 AND the Blair 11750 lube stick.
I drilled out all the spot welds to remove the aprons on a 2005 Ford Focus using this tool and lube, and only used one cutter bit for the total project, which was around 150 welds or so..
The lube stick is awesome, it cuts faster and the bit lasted for the project.. money well spent.
I like the fact that it cuts around the weld, leaving the metal intact on one side of the seam. Just take a disc grinder and dust off the weld from the flange and you are ready for fit up of the new panel..