wut do you mean by wet sanding? do you really mean it sanding it during wet? or do you wait for a minute or something? and do you do this over and over to make it better, shinier or something?
sorry, dont know nothing about this
After you spray the paint on the surface, let it dry really well, then turn on your kitchen or bathroom sink, and use 1500 or 2000 grit sandpaper and lightly, using circular strokes, sand the surface until it looks completely uniform (you'll have to let it dry to be able to tell if you've sanded enough). Be sure that your piece is completely dry again before spraying the next coat. It's ok if end up sanding through your first couple of coats, the only thing that's important is that you use thin coats of paint, and get the paint really smooth with your wet sanding. You want to do this with EVERY coat of paint, even your final clear coat. My usual paint sequence is:
primer: Krylon Fusion (bonds well to plastic, but I don't like the finish
color coat: Duplicolor paint, available at most auto parts stores
continue adding color coats, sanding after each until you don't see any of the primer through them anywhere
clear coat: I use two or three clear coats, and I wet sand between each
Wet sand after your final clear coat. I know this will dull the surface, but it's worth it later. Next, buff the paint with 3M brand Body Repair Rubbing Compund. I use the Fine Cut variety, and it produces a wonderful finish by removing the 2000 grit scratches from the wet sanding.
Finish by rubbing the paint surface with your favorite paint polish (Meguiar's Deep Crystal works wonders)
Hope this helps!