Crown seal bottles with roughness at the lip

[pinopio]

Hi everyone! As per the title, I have a question about crown seal bottles with roughness at the lips. I was given a batch of longneck bottles, but some of them appear to be quite old and have what might be described as "microchips" at the aforementioned spot. Photo attached to illustrate. I'm wondering if such bottles would still seal up ok, or would it be best not to use them? Many thanks in advance!

 

[An Ankoù]

I've never seen bottles like that. Looks like they've been put in a crate upside down and then dragged through gravel.
Why not put them to one side and just use, say, the 3 worst ones to see what happens and use good bottles for the rest of the batch.

 

[clickeral]

You could use some wet and dry sandpaper with some water to smooth them out

 

[MHB]

It’s something that’s been seen before. Mostly on quite old bottles.

The cause was a type of bottle opener that puts a lot of pressure on the centre of the cap. This can cause fine spall of glass to flake away from the inside, toward the outer edge - this type mostly I think.
Surprisingly the bottles often seal just fine. Unless the spall runs right across the rim, like the one at about 11'Oclock on the pick above. I would probably avoid the one pictured but many are fine.
Mark