Hey good follow up !

I am surprised that you were able to find a brand new cover plate.
Versus using a junk yard pull.

Are you going to prime and paint the new one?

I would recommend priming it a couple of times under the weep holes or completely on the underside.
Just to keep the 'weather' from doing it in over time.

Have a good one !

__________________
1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
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1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD