I want to glue a piece of steel to my truck's windshield, with some
threaded holes so I can attach anything to it (such as radar detector,
parking permits etc).

My question is, what sort of steel glues best and what is the right
surface prep. Should I sandpaper it? Should I sandpaper the glass?
What is that rearview glue exactly?

Also what is the minimum ambient temp at which I can do the gluing.

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