I'm sure many older zeds will have this issue ,at the leading edge of the sills and the rear of the wheel arches , feather the edges with 2000 wet an dry , remove any wax or polish from the area to be 'touched up' , mask and give it a blast with lacquer from a rattle can , use 3 or 4 very light coats . Inspect the work , correct if necessary with a cutting paste (a few days later) , polish and wax .