tuan, I agree with the others. Once a pan is used, the cooking surface will never look as smooth and shiny as it did when new. Don't worry about the scratch or about adding others. It's part of life.
I regularly use SS utensils in my SS pans and the light surface scratches just indicate that I really cook. Remember, it's a tool, not an art piece.
"If you want to make an apple pie from scratch, you must first create the universe." -Carl Sagan