If you have some trim monokote sheets, they are self stick and can blend in well. The before mentioned box tape has been a favorite of mine for years. 3M makes a 3" wide roll of box tape that is a particular favorite of mine. If the hole is on a rib bay and you have some matching covering, cut a patch about 3/4" bigger than the hole, clip the corners so that the don't tend to curl up, and tack down along the edges carefully. When you have the edge sealed all the way around, then shrink with the iron. It helps of you can go from rib to rib with any patch.
Type at you later,
Dan McEntee