wet sanding help

Nope unfortunately, if you think about what a single stage paint is you've got mettalic particles suspended within transperant toners and there at all levels of the film build including the surface. The moment you start wet sanding you begin cutting into and disturbing those mettalics and removing the toners(color) that there within and begins destroying your paint job.
This is one of the biggest negatives of single stage mettalic paint so you'll have to repaint or live with the way it turned out.