Installing Stainless Steel Brake Hoses

[JimZRyd]

Need some advice Brothers. I'm in the process of doing a few projects on my 94 and have gotten to the point of replacing the rubber brake lines with braided stainless steel ones. I've ran into a road block as I cannot for the life of me get the darn hard line loose at the connection to the rubber hose. I initially tried with just a regular wrench and that wasn't working, so I went and bought a set of line wrenches and tried the appropriate size, 12 mm is what I looked up, and still cant get it loose. Tried so hard on the right rear that I rounded the edges to the point I'm going to have to get someone to help me replace it, so I moved to the left rear and cant get it to budge either...Stopping before I round that one off as well. Anybody got some words of wisdom or bag of tricks for this??? Any help is greatly appreciated