Please choose the correct solution to the question: How do I smooth the edges of the board ?

Solution1: Use a sander with 120 grit paper, you might want to use a drill with a sanding attachment for the holes, or you could also sand it by hand.

Solution2: Use a sandblaster at 120 psi, you might want to use a drill with a sanding attachment for the holes, or you could also sand it by hand.

Answer format: solution1/solution2