Drive an old vehicle and you will have to deal with brake repairs. A brake line was dripping on the old pickup and another adjacent line was nearly rusted through. After removing both of those lines, the entire brake system was full of air, so after replacing the lines we began bleeding at the far end of the system and worked our way back. A patient assistant is a must, and you must get out from under after several pumps to replenish the brake fluid in the master cylinder. You may have to touch up the bleeding after you have made the full round, but you can do this. The old beater is back on the road today! Replace the protectors on your bleeders to keep them from clogging with road grime. (PS, This is the easy part after removing rusty brake line fittings and assembling new line into your system!) (PPS, Do NOT use incandescent trouble lights under your vehicle while working with brake fluid! That stuff will light up your garage. The Studebaker garage in Swedesburg, Iowa caught fire many years ago when a light bulb broke. The mechanic was under a car and barely escaped.)