Wetsanded Through The Clear. Now What?

If it were me, I'd sand the entire panel (gently) with 500 grit wet, mask off that panel and reshoot just that panel with clear. Be very careful with your first coat around the spot you sanded through because if you get too heavy with the first coat, it'll wrinkle. Just put on a medium coat, then a couple slightly wetter coats and call it good. You can blend in the edge where your masking paper stopped by lightly sanding the ridge with 1200 and buffing by hand. BTW, I usually stop short of completely flattening a panel when color sanding. I know the pros sand all the orange peel out, but I leave just a touch as kind of a "safety barrier". That way I know there's enough clear to buff. Also, tape all your edges before you start sanding/buffing so you know where to stay away from. The edges get enough buffing by accident to take care of them. Also, edges are much, much thinner than flat panels. Good Luck!

Sorry zookeeper but you cannot simply re-clear a panel if you have sanded though to the base coat because that spot will show right through the clear. The entire panel needs to be re-base coated first with at least one good coat and then 3-5 coats of clear added. The problem is the paint begins to get too thick. I prefer to sand the entire panel until I get to the primer and start over in a case like this. It is because of problems l like this I always put a little more clear on than the paint manufacturer recommeds because I am going to sand a lot of it back off.

For a pearl, candy or a metal flake I'd do as Ronstang says. If you shoot clear over the spot you've sanded, you get a slight color change at that location. If you don't mind the color imperfection, then you could sand the clear on the rest of the panel, and then re-shoot the clear. But you have to watch the paint thickness as Ronstang mentioned. Alot of times its easier to just start over on a single panel.

If it were a solid color, then I'd sand alot of the clear off and then just reshoot clear on the panel.