first off,cut the rusted area out around it before it spreads further,its relativly flat so it shouldnt be hard to have a new patch welded in.
btw,is this common? were are the common rust area's on the taurus? besides the rockers,bottom of doors,trunk lid. i've yet to really dig into my sho to find the affected area's. btw,is it common for the strut tower's to rust out?