I have a fairly new deck/patio with pressure-treated lumber.
It's a bit splintery where the screws are.
I would like to sand it down so that it's nice and smooth against bare feet.

There's no problem sanding it a bit by hand with sandpaper, right?
I started a little but it's so much lighter in the areas where I've sanded.
I got a bit nervous that I've done something wrong.

I took a picture that I'm attaching.

Close-up of a wooden deck with visible screw marks and areas that appear sanded, resulting in lighter spots compared to the rest of the wood planks.
 
A bit overdone maybe, but add one of these and it will look nice.
A metal rotary burr tool with a textured ball-shaped head for finishing surfaces.
 
What is it?

But my question remains, is it completely safe to sand a little with sandpaper on a pressure-treated wooden deck?
 
It is a grinding pin.
What would happen if you polished, do you mean?
 
specter said:
What is it?

But my question remains, is it completely harmless to sand a bit with sandpaper on a pressure-treated wood deck?
Yes, it is completely harmless, but it can take a couple of weeks for the light areas to even out where you've sanded.
 
They are not for wood.
 
isn't it a non-issue really? I probably have never gotten any splinters in my feet from any wooden decks.
 
If you grind so that it becomes a larger 'grop', isn't there just a greater risk that it will chip?
 
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RoBo
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What you sand will even out over time. Worse with the pencil marks; they will take time before they are not visible.
 
The problem is that the screws have been pulled too far, which is too late to fix now. Sandpaper is hard to reach, so I mostly believe in StefanN's tip. That the grinding stone is not for wood probably won't matter.
 
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RoBo
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