Thrust Washer Adjustment

["Mark and Kathy" <mgtrcars@galaxyinternet.net>]

What is the best way to remove  one thousands from a thrust washer?
This is an MG  laygear washer that is grooved and polished on both sides.
Doesn't look like the all copper thrust washers in our healeys.

Is sand paper or a file enough to take this down evenly?  If so what would the
process be?   I  don't have a bench grinder or belt sander.

Thanks,  Mark