I'm currently in the process of restoring a set of pitted & fogged up lights I pulled off a parts car. Ive come across a weird blemish in the lens that is apparent on both lights. I'm not sure if this is on the outside or inside of the lens. If on the outside could it be my sanding technique? or possibly just a heat wear mark from the bulb on the inside of the lens over time? I usually start off with a 600/800grit depending on bad they are, and then move on to wet sanding with 1000grit, then 2000 in a crisscross pattern followed by M105/205 using a DA w/cutting pad.
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