“oil canning tricky to pull off in plastic.”
Indeed. A tedious and annoying process. It is also a legitimate excuse to not fill in every molding dimple or sink that might be on a part. Denting and what not. Attached is a photo of me at work c.early 1990, and you can see the photographer’s (now a big shot international 747 captain) wing is definitely in need of filler and sanding, LOL