Hello,

I am restoring a 1973 Schwinn Varsity. I have the bike completely disassembled except for the crank. I took off the pedals, pulled the crank, unscrewed the chain guard and large chainring, but I cannot remove the lock ring that holds the small chainring in place. I have been applying Liquid Wrench penetrating oil to it every day for a week, but I can't get it off. I am using a large pair of locking pliers to try and remove it.

What can I do besides taking it to my LBS and getting them to remove it with their special tools?