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Start off with a good wash, clay, sealant, wax. Keep it protected until you get a machine. A sealant to look into is Detailer's Poli-Coat Paint Sealant. Has some cleaning agents in it and lasts long. Then follow up with a wax such as Collinite 845 or Meg's #26 or Gold Class Paste Wax.
These products are with having a budget it mind.