What you described would be TR3 or Nufinish, except the dust part. I don't know of any singular product that polishes and seals that doesn't leave a ton of dust behind. I use separate products for compounding, polishing, and sealing.
Turtle Wax Ultimate Compound with an orange cutting pad. The least aggressive compound I've ever used, can be substituted for polish.
Collinite 845 with a gray wax applicator pad.
Maintained with P&S Beadmaker at every wash.