It is hard to say. The cleaner is a very mild compound, but it would be worth a shot before moving to a more aggressive compound and a real high speed buffer. Easy enough to just try one spot and see what the results are. Depending on your budget, sometimes it is money well spent to have a pro get the boat buffed completely out and then just spend your time maintaining it. Especially since I'm assuming the red and silver are stickers on top the black. need to be careful not to mess them up.
My last boat still looked brand new after 9 years, as a result of never allowing it to get oxidized or stay dirty for any period of time.