LED Dome sanding or "Frosting"?

The best thing for cree rings I have tried is hairspray on the reflector.
Blends the rings to a uniform smooth spill.
Hold the can a couple of feet away from the reflector so that the spray can dry a little on the way and "dust" the surface when it lands.
 
Do not touch the cree dome as it can become dislodged easily - effectively destroying it.
 
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