Removing rear bumper on 93-95 90?

[Elliott Potter <epotter@abraxis.com>]

I'm trying to remove the rear bumper cover and trim on my 90 to get at
some atrocious bodywork done by an incompetent mechanic (Gerhard's
AutoHaus/Atlanta European Collision in Tucker, GA), but it seems that
I'm missing some very important attachments somewhere.  I got the two
long bolts that go into the bottom of the bumper cover, and got 4 screws
from the back of each wheel well for the trim, but something is still
holding it in.  Any clues?  Which is supposed to come off first, the
bumper or the trim?  It looks to me like the bumper should, because
there are a couple of nuts that hold the trim on that are much more
accessible if the bumper cover is off.

Thanks all
--
Elliott