A body cleaner and polish?

Having sorted out the best black part of the body renovator I will want to move onto the main body.  Is all it needs is a quick wash or does one need to be more particular?  By that I mean a special cleaner, a sealer, a polish or a wax?

Now I am only joking but this range is a must -

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and this in particular...

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bit too cheap ?

Ouch!!!