if you really can't get someone to mig those holes up, then you should look into panel bonding glue and a metal plug the same size as the hole even if you have to enlarge it a bit to get a good fit on the solid plugs. Backed by a other(washer that is larger glued to it from the back side as a backer and to help glue to the panel.) I have helped a guy in the field do that on his 270 to gt trim and it's been 5 years since he did that and it still looks fairly good. he did a crappy paint job ion the repair though and on really hot days you can see a very very faint ring if you look hard enough.
