repair airbrush goof?

So I’m helping my high-school-kid neighbor shape and glass his first board. He did all the research, bought all the supplies, does all the work - I’m there for questions and advice. It’s been really fun for both of us and his stoke level keeps going up as it nears completion - a 6’2" x 21" x 2.5" swallow tail.

Anyway, he did like a 4" airbrush of his initials on top of the lam as kind of an afterthought. Paint was dry two days, and then while the hotcoating the deck, the edge of the brush clipped the paint and made a big scratch mark. My question: could you just sand the hot coat there, touch up or redo the initials on top of the hot coat and then re hot coat that small spot?