Looks like a hull repair. What was the damage you are fixing? Just a gouge, or an honest to goodness hole? If it's a hole, did you grind it back to a feathered edge and lay in multiple thicknesses of glass to bring out to thickness? There are many interwebs tutorials on fixing a hole, even repairing a hole from an unused through-hull fitting - I've seen a few here and there.
As for those scuffs, they look like scratches in the gelcoat… Are they? If they are scuffs, some compound should get them out, unless they are deep, and then you'll be trying to wet sand them out, then compound, etc. until you've polished the whole works.
My little boat looks as if it went toe to toe with a dock piling and lost. I wet sanded and polished it a bit, until the scratches looked a bit better, but I didn't go nearly far enough to remove the scratches. What it really needs is some color matched gelcoat sprayed on and sanded smooth. Not worth the trouble for me, so I just don't look at that side of the boat.
