When refurbishing something made from wood it’s more efficient to start with a coarse sandpaper, sand the entire project, and then gradually progress to something finer.
You could, in theory, start with the fine sand paper. But progress would be slow. It would be more work than necessary. You might even give up before you finish.
It’s worth applying this methodology to other project’s life.
When starting something new, rough and done is better than polished but incomplete.