I have attached a picture of my boat after it was wet sanded not long ago. I haven't found any areas that felt noticeably "rough", but you can see in the picture the color difference from where the stickers were compared to the rest. You can also see some "waveyness" or orange peel type look on the top cap towards the front of the boat.
Does it appear that the gel coat is too far gone or would it be worth another attempt at wet sanding to "get it right"?