I've got a not so very old steel Peugeot frame, problem is it has a cartridge BB seized in it. It's a welded frame, so I cant pour lube down the seat tube, but I've pulled the cable guides off and have been applying White Lightning Epic lube into the hole (it's really thin, and has lots of solvents, so I was hoping it would penetrate the threads), but so far no joy. I've got a feeling that rust is the problem here, and perhaps the mechanic was a prick and didn't bother to grease the threads. Does anybody have some suggestions how I can get this thing out? The BB is knackered btw, so leaving it in isn't an option.