I picked up a Ciroflex TLR last year and need to remove the taking lens in order to dismantle and clean it (the shutter blades are pretty oily), but I can't get it to budge. Would a typical spanner wrench likely give me enough torque to break through what is likely (based on the condition of the rest of the camera) some rust? Maybe some liquid around the threads is called for? Right now I'm just trying to use two screwdrivers and I'm not getting anywhere. Thanks!