I have the same year and model 5er and the only part of the skin I have found to be metal is the sheet of diamond tread aluminum on the front of the coach under the overhang, everything else appears to be fiberglass.
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2022 Ford F-350, Lariat, Crew cab, 6.7L Diesel, 4X4, FX-4, train horns.
2020 Puma, 257RESS fifth wheel.
STS1(SS), USN, Ret.
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