I have been putting on some good mileage on my new to me Super Course. When I got the bike it had a buggered up crank cotter on the drive side. Someone had taken a punch and really mangled the cotter. I finished the job by banging it out with hammer and punch. I supported the bottom bracket as best I could. In the process the fixed cup came loose from all the hammering. I assume that the threads have been damaged and now when I put the bike to a test(cranking up steep inclines) the fixed cup loosens up. If I use something such as Loctite on the threads will it be able to be removed in the future?

I looked up and found Loctite Blue. Anyone use this, and does it keep things tight?