I'd say concentrate on filling all knicks, scratches first as it's not something you should go back to then after all the hard work polishing, etc.
The Dr Colorchip system is a fast, and relatively easy system in which the touch up paint dries and cures quite quickly. Still, one would be wise to wait a minimum 1-week period for all touch up work to be fully cured before moving onto Polishing, or Sealing-Waxing Steps.
Decon is important, and again should be properly done first. Most here will first wash, degrease, remove Tar, then onto products like Carpro Iron-X then Clay or a Clay Substitute Sponge-Towel.
Once those steps have been done, "then" polishing can be done.
I'd avoid wet sanding at all costs if possible, it will remove too much precious Clear Coat.
Wolfgang Uber Compound, although seemingly a little pricey, is superb at being a very good 1-step which will better remove deeper RIDS, (Random Isolated Deep Scratches) but yet it will finish down beautifully like the best very fine finishing Polishes.
It's a very easy product to work with, and will give quite stunning end results. Can't say enough good about WG Uber.