Polished copper nickel brake line

It is very soft to work with, I hate it because it is hard to get a straight section that actually looks "straight", I love it when I'm fishing it through a customer's rusty beater
instead of poorly routing it or disassembling half the car to get it in there. You definitely have to be "kid glove-ish" doing double flares, and You HAVE to polish it and coat
it with Never-Dull etc. because it will turn green & shitty if exposed to the elements if You don't.