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When I recondition lights for customers I install clear bra film after sanding and polishing.
The reason you need to do this is because what you just sanded and polished off was the original UV coating that was over the plastic lens from new.
Once this is off the base polycarbonate plastic is very susceptible to oxidation and will do so in a few weeks.
The PPF is easier than masking and spraying with clear coat (which is the other way to go)
The PPF offers 2 plus sides, it blocks some UV while keeping air/ozone from attacking the plastic and it also offers resistance to stone damage.
You can purchase pre cut DIY headlight film from XPEL.
It will be 30 MIL thick which is really overkill...
I purchase my film from a local supplier and just use 8 MIL which is standard for PPF that goes on the painted surfaces of most cars.
If you are going to clear coat your lenses, using a 2 part catalyzed automotive clear is the best for durability.
You can buy this in a "convince" rattle can that has pre measured catalyst that you "mix" by pushing a button to break the inner seal. Then shake and spray. You have an hour or so working time after that. Available at paint supply stores like Finish Masters or Sav On Supplies. ~ $40.00
Using an un catalyzed clear like Krylon won't last as long from the UV standpoint or if you get something solvent on the lens.
Cooper
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