Duck tape!?!
I think you're all quacked up!
Anyway, that makes sense.
I could easily use screws to attach a panel to the sheet metal. Maybe a dozen screws per wheel. Of course that would reduce the resale value of my 18-year old, 288K mile car.
To avoid screw holes on the surface sheet metal I could screw a bunch of angle brackets to the inner face of the wheel arch, so the brackets' other legs are even with the body sheet metal. Then screw the skirt panels to those brackets.
Gotta find some coroplast/colorplast around here in the eastern US. Hopefully not too pricey.
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Currently getting +/- 50 mpg in fall weather. EPA is 31/39 so not too shabby. WAI, fuel cutoff switch, full belly pan, smooth wheel covers.
Now driving '97 Civic HX; tires ~ 50 psi. '89 Volvo 240 = semi-retired.