thx agent sm1th. as you say I prefer doing stuff myself since I already have a wing that only requires just a tiny repair, a MIG, spare sheet and paint and it's more practice learning about how to repair, and this skillset will help when I next goto repair the sills and many other things.
I'd consider buying & painting a new panel if the old one was so poorly rusted that it's faster cheaper to get it replaced provided the panels available.