Some of those gouges look fairly deep. You'll need to grind and dish out the worst of it
I'd tape off the surrounding area to be repaired to protect the hull from accidental damage when sanding. Use a Dremel tool or similar to feather out the smaller light scratches. For those three large gouges in the center, dish them out using an orbital sander or similar with heavy grit paper (40-60grit) to get down to nice clean glass. Clean area thoroughly with acetone. Tear up some small pieces of CSM and apply to the deep areas to build some thickness back. Using laminating poly resin (no wax) and a chip brush, apply CSM one layer at a time and check height of repair using a straight edge after each layer of CSM has tacked up. Once you get it to about 1/16" below flush, your ready to apply gelcoat. Brush on the first coat of white gelcoat using a chip brush (for this I use waxed gel), and let it cure to a hard finish. Once its hard, block sand the area with 120 grit and repeat subsequent coats of gel until you get a uniform level surface. Remove masking tape surrounding the repair and wet sand the repair up to 800-1000. Polish and buff to a shine and your done!
If you check my boat repair thread in my signature below, I will be adding some pictures soon showing this process. Good luck!
