We all tend to be critical of our own work. Once the pattern comes off, anyone else is hard pressed to find an error. I also try to cut through the line. I use a sanding mop if I need to sand in between, especially on odd shapes like puzzle pieces. You will find as you go along that you will collect a variety of items to use in your sanding. Needle files, emery boards, dremel bands, sanding mops and drums, etc. You can even use a brown paper bag for finish sanding. Use your imagination, there are lots of things out there that will sand.