Chisels that are in good shape, you usually do not need to go back to 80 grit unless you damage or chip the tip or corner. a tuned chisel that is starting to dull just needs to be gone over from 400 to 1500. Exactly how coarse you start on depends on how it looks and your judgement.
If you've used your chisels when they are sharp and when they are not, you know the difference. You can shave and plane with a sharp chisel. You fight and cuss with one that is not., and you end up gouging when you don't want to.