Hi Pierre,
Something like Clearkote Vinyl / Rubber Treatment or Poorboys Trim Restorer should help bring the window surrounds back to life... A couple of applications of applying, leave to dry for a few mins and then remove should do it, and they should help to remove any dirt etc as well. These products are a bit greasy if you get them on the windows or paint when wet so just make sure to have a clean cloth to hand.
For the wheels, I'd go with the Four Star Wheel Gel. It's ph neutral so is VERY kind to the wheels. You don't need alot of it per wheel, just a few squirts, and a paint brush to work it round the wheel, then rinse away..... I'd still rewash he wheels when you do the main car though... Just good practice. Once done and dry, you can either use a dedicated wheel sealant, or the sealant in the SP Kit will be fine to give them some lasting protection, and will help make them easier to clean in future.
If you want to dress the tyres is up to you...... You can use one of the above products you'd use for the trim, or I'd go with something like Poorboys Natural Look Dressing which gives a nice, matte look finish, and can be used on interior plastics, trim etc etc.
Hope that helps.
Alex
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