The insulation on the under-side of the '85 SD hood is gone, just traces of the old adhesive are left. Is this insulation necessary, useful, required, nice to have, etc.?

I wonder if it is more for preserving the paint, noise control, or to keep wandering hands from being blistered.

Any help/comments welcome, and where would I get the replacement if I need it?

BCingU, Jim

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'96 E300D 58k mi (wife's daily ride)
'95 Audi 90 118k mi
'92 GMC Suburban 138k mi
'85 300SD 230k mi (my daily ride)