Exterior

Not at all. The Nissan receiver/trailer hitch as well as aftermarket units all bolt on just under the rear bumper. Note that this affects your departure angle if you off-road.

M10 x 1.25 x 35mm.

Dupli-Color T177 Gunmetal is a near perfect match.

BSM or "Body Side Moulding" is a four-piece set of plastic trim, with a piece applied to each of the four doors in a horizontal fashion. It is meant to protect the doors from impacts, such as in a parking lot by a shopping cart, for example.

Apply peanut butter with a rag and rub briefly! Yes, this actually works. Be sure to remove the peanut butter when done, and no - the chunky kind isn't better.

Some exterior protectant products also serve to remove wax, or at least hide it.