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If the bevel has been set on a 4K I would then perform 10-15 laps on the 8K and test the edge. If necessary then I would start at 10/10, 5/10, 3/10, 1/10, 1/10. Testing frequently.
If another round...

Then start with the 5k/8k stones. Go to a coarser grit if the dings do not come out.

Jimmy stated it well. What we really need to know is the condition of the edge your starting with. Is it an antique store/ebay/vintage razor that you have not worked on, a new razor or.......?