Color sand it with 1500 wet/dry , use a rough compound first. I like Perco, its like rocks in a can...Great for gel coat. Then I go over it with a medium finish compound with a new buff pad. Then i'll use 3M Finessit glaze to seal it and remove any buff marks. If you have deep scars you can blend them in if have enogh gel without hiting glass. Make sure you wax it when your done. I found it holds up longer with regular waxing's. Need any help give me a call...
Mike