You have always to claybar your car before to polish it !!!
If not you can make another scratches with contaminents stayin' on the bodypaint when you use your rotary machine and polish.
Quote:
Remember the 7 steps to clean completly your car :
1) car wash
2) clay bar
3) second car wash
4) polish
5) finishing polish
6) glaze and sealent
7) wax
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