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Quick question on gel coat sanding

Motor Boater

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I had a few spot in my keel where the gel coat has rubbed off and fiberglass was starting to show. A few of the spots had pin holes with small voids so I filled everything with marinetex repair kit. I want to sand down some of the areas where it went on kind of thick but I’m not sure what grit and type of sandpaper to use? I’m hoping to sand away some of the white repair spots so it’s not so noticeable. Thanks
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Gelcoater

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I had a few spot in my keel where the gel coat has rubbed off and fiberglass was starting to show. A few of the spots had pin holes with small voids so I filled everything with marinetex repair kit. I want to sand down some of the areas where it went on kind of thick but I’m not sure what grit and type of sandpaper to use? I’m hoping to sand away some of the white repair spots so it’s not so noticeable. Thanks View attachment 848443 View attachment 848445 View attachment 848446
Tape is your friend here.
Lay down tape around the spot so when you sand you’re sanding the spot. Once it’s down to tape height, pull the tape and smooth it the rest of the way.
I’d probably start with 220 or 360 then work up.
 
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