If they used wax then what i assume you are describing is the wax filling the gap on the car where the clearcoat and quite possibly the paint was scratched off.
with the wax filling the scratch it works as a mirror and reflects the paint surrounding it, so now in some angles the scratch is gone because the wax reflects the color of the paint and it is a smooth surface
it is no longer white because of this, yet you still notice the scratch in some angles because the scratch is still present just masked by the reflection
just my 2 cents
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-Rickey
09 Brilliant Silver 370z Manual W/Sprt Pck
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