When cutting tracks by a spice always make sure to cut with a Non-Ferrous Metal Cutting blade.
 
We use this 10-Inch Saw Blade 80-Tooth TCG with 5/8-Inch Arbor
 
You're welcome to purchase this or equivalent. 
 
After Cutting use the Sanding stick. First the red 180 Grit side than the white 220 grit side for a smooth finish.