Dave- the '71 air cleaner came both ways. Wrinkle or regular black. I looked at many originals before I had mine powder coated in black wrinkle. I found more that had a standard black painted finish, but since my original was long gone, I decided to go with wrinkle since I like it😬
I agree the wrinkle looks better. Probably the way I'll go.
The reason I asked the pie tin question is I was thinking that they may not have used any thing on the air cleaner as it wasn't installed in what is a traditional muscle car like a GTX ,Road runner ect. This being a HP 383 in a Sebring Plus.
Dave