removing brake line fittings

If at a hose or junction, always place a wrench to hold back. If possible, place the wrenches close so one hand, thumb, them to loosen. It is important to limit the travel, other wise if the nut is stuck to the line, it twists. A small turn, to break loose, then check, that nut moves on line. Quick heat to just the nut, then quick shot of penetrant on line. Be careful of fire hazards.

I grew up in the salt belt.