I would use a quality wash soap with 2 buckets with grit guards. I Quality soaps include Optimum Wash, Duragloss 901, or Poorboys Super Slick and Suds. Wash with a quality sheepskin mitt or a grout sponge. I have been using the Proline grout sponges from Lowes ($2 each) and I love them.
I would head over to Autopia.org to get some ideas on different waxes or sealants or polishing methods you might want to try. The product flavors of the month are Blackfire Wet Diamond and Menzerna Powerlock. I have used both and they are excellent.