One proposed use for a magnetic sail is to allow an interstellar spacecraft to brake as it approaches its destination. But could a magnetic sail also slow down a spacecraft traveling between planets? To be clear, I'm not talking about braking against planetary magnetospheres (as mentioned in Magnetic / Inductive braking against planetary magnetic fields?), but braking against the interplanetary medium.
If it worked, it could potentially save a lot of fuel, since spacecraft normally need to expend fuel to decelerate as well as to accelerate, leading to better mass ratios.
If this wouldn't be practical with a conventional magnetic sail, then would it be practical with something like the plasma magnet drive instead?