I agree with scratch X. Excellent choice. For your deeper one, you can fill it in then wet sand . Start with 1000 grit then follow with, 1500, 2000, 2500, 3000, 3200, 3600, 4000, 6000, 8000, and then 12000. Always make sure the sand paper is wet. I personally start with the 3k and if I need...