When detaileing a new to me Porsche 993 I found fish eye on a rear quarter panel. I used 2500 wet sandpaper to try and sand it out and bingo...I went through the clear.  I now am thinking of using your spray can clear to re-clear the 1" diameter spot. What would be the best approach.
If this doesn't work I'll take it to a professional and have the entire panel re-done.  ??)

You really should apply some basecoat to the area where you went through and then use clear over that as this is the correct way to do it. I have never just sprayed clear by itself as you will not get a nice finish.

So I should rough up the surface around the damaged area (say 4-5") with 800 grit, blend in some basecoat, let it set up, and then spray clear over it?
I'm afraid of using 800 on the spot itself as I don't want to get to the primer if at all possible.

Would you mask it off, use the spray through the hole technique or just "do it".

Thanks

Yes, scuff the area. I would not mask it off, just spray to a  panel so you don't leave a clearcoat edge in the middle of a panel.