Just purchased a used 2016 850SP and have a couple of questions. First off, the white metal and aluminum parts are quite oxidized, is there any product that I can spray on that will remove the oxidation but not harm the steel, rubber and plastics? Also, are there any maintenance issues or things I should be aware of?

I have greased it and will be changing all of the fluids today. Is the Polaris grease any good or is there something better out there?

Thanks