Subject: strange piece under front wing

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I am refurbishing the front wings of my V12. During preparation for painting the underside I realized this strange remains of a metal net between some pieces of sheet iron. This is on the drivers side. It is not connected to the inside of the spare wheel compartment. IWho knows what it is?
(I saw it before but did not care about it but now I would like to remove it, I do not see any use of it)

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