That reminds me that one of my older sisters' 4-H projects was making slipcovers for wire hangers out of pre-quilted fabric. They were open at the bottom so that you could slip the hanger in, if I recall correctly. That would make it possible to salvage the cover if the hanger got stepped on and bent -- and if covering a plastic hanger, I'd definitely make the cover open; plastic goes brittle and breaks up after a while.
I use wooden suit hangers for nearly everything. When I dry stuff on hangers, the extra width lets air in and prevents creases.
I actually *buy* wire hangers -- for skirts, pants, and lengths of fabric, there's nothing quite so convenient as a wire hanger and two wooden clamp-type clothespins.
Or, for some lengths of fabric, *six* wooden clamp-type clothespins. (One needs a very sturdy closet rod if one is going to hang fabric on it.)
Joy Beeson