Spray down the engine's metal surfaces with silicone lubricant?

[GoneBoatN]

One of the steps for winterization is to use silicone lubricant to protect the metal surfaces.

Can anyone offer advice/instructions? Do you just spray everywhere or do you have to avoid getting it on wires, electronics and all the other stuff that the marine engine is basically wrapped in? Suggested brands? I would think you would not want to get any on the K&N air cleaner as it takes a particular oil.

Thanks in advance.