Clear lacquer can provide long lasting protection if the damaged area is cleaned up first; depending on the type of damage, either with fine wet and dry paper and / or a mildly abrasive polish.
I suffered similar damage on the edge of one of my diamond cut alloys when I had my mk6 GTD, which resulted in a small scratch about 1 cm long. Most people probably wouldn’t notice it, but to me with my car-OCD, it was noticeable.
It was a ‘clean’ scratch, so didn’t need rubbing down with wet and dry. I cleaned the damage with some mildly abrasive polish, carefully filled in the scratch with clear lacquer and when it was dry, polished the repaired area so the lacquer in the repair was smooth and level with the surrounding area. I then applied a couple of coats of wax for protection.
The DIY repair area never deteriorated during the remainder of my ownership of the car, which I think was around 3 years after I repaired it, and it was very difficult to see - even to me with my car-OCD!