I was sad when Harbor Freight removed Collinite 476 & 845 from their shelves...it never seemed to sell in my area (accept to me! lol)
Once at HF, perhaps a year or so ago, I scored some "nanowax" type of offering as well (Eagle One?) for a few bucks each ($2?) which actually has proven to be quite useful (very easy to apply, minimal surface-prep/buffing, decent longevity, and looks good on darker/metallic finishes).