couple options
I'd try a clay bar from the auto supply store. (Several brands usually available in the detailing/wax section) It will probably get a lot of it. If that does not do it... might be time to get aircraft grade go to Aircraft Spruce or something like that and get some micro-mesh and spend some time "sanding" it off.
there are other threads out there..... with good answers (I know... I asked about overspray on my canopy earlier)