Problem: When spray painting an object, it almost impossible to avoid the spray dust from making the adjacent, already painted, areas dull, and not gloss. Some of the dust can be blown away when it’s all dried up, but some will stick. Even if painting the whole object in one move, this will be an issue.
Solution: Using ordinary household silver polish (= liquid ultra high grade sanding paper) this can be ‘sanded’ away easily. Use a dry cloth, and grind in small, round movements until the surface is free of spray dust, making overlaps invisible. Wipe afterwards with a wet cloth.