HI 

To buff out the gel coat finish on your kayak there is a compound called Gel Gloss as it has just a wee bit of abrasive grit in it that scrubs away the old faded colour layer and reveals the fresher layers of the gel coat underneath.  

Can buy on Amazon or any good marine supply store:  

For more repair work for larger gouges or holes this article may help too

Gel coat repairs for composite kayaks  

hope this helps, 

BorealDesign Customer Care