<human>: Here is a goal: How quickly should I grind and polish the concrete when making a concrete countertop?

Which way makes more sense to accomplish this goal?

OPTIONS:
- Do all your grinding and polishing after 4 days but before 10 days so the concrete is stiff enough but not full strength yet
- Do all your grinding and polishing after 4 days but before 10 days so the concrete is stiff enough but not full wetness yet
<bot>: Do all your grinding and polishing after 4 days but before 10 days so the concrete is stiff enough but not full strength yet