the only thing i run in the cut is a sisal after that i use the bottom on the wheel and go side to side

here is how i do it ..
step 1. cut sisal/black
step 2. color sprial /black
step 3. color sprial/green
step 4. color loose/red
and you get this :

depending on the part i got with sisal/black then sprial green then loose red...
but now that i stole you topic .. no you do not need to do both for each compound .. some times you end up with a lot of scratches if you do it with them all ... but every one got there onw way of doing it