So I'm trying to replace the wheel cylinders and the nuts and brake line fasteners just aren't braking loose. I tried both my line wrenches and my socket wrenches and they don't seem to be doing any good. I already started to strip the brake line fastener so I stopped that.

Do you think some WD40 or acetone sprayed on there would help any? I may have to pick some up in the morning. For now I shall take a warm shower and head to bed.