Note using kero on you paint... not a good idea lol.. if your after removing any type of wax/grease get a proper grease& wax remover.. I\'m no painter, but am a panelbeater, I would give the whole care a nice wash.. give the whole car a good hard buff with an electric buffer, using cutting compound, so a fairly abrasive compound, wasting your time doing the cutting by hand.. once you have got a nice scratch free car or close to to, depending how deep the scratched were to start with, as cutting will only knock the scratches in the clear back.. then to remove the swirl marks from buffer use a hand polish and go over the whole car.. then give it a nice wash..
Note: If you do use an electric buffer, be very careful around any plastic areas , Including , bumpers, moldings etc, as the buffing wheel and the plastic get hot fast and you WILL burn right back to plastic.. So go low speed on plastic areas haha,