I was polishing with 106FA on my 6.5" LC Grey pad and a 5" backing plate on speed 4 - 4.5 this weekend and the outer inch of the pad kept forming a hard crust. I saw some minor holograms in the end. What would be causing this?
The part the backing plate covers was wet. I assumed I needed a bigger backing plate but it says 5" backing plate is meant for 6.5" pads.
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