I have touched up rock chipped carbon fiber by mixing some west systems epoxy with the slow clear 207 hardener in a small cup, and using a very small cheap paint brush (like the kind from model cars), dab it in the spot. You will need to carefully cut away the PPF from the spot to be touched up. You also need to take an exacto knife or razor blade and pick at any loose resin that is still remaining around the chip. I took a small amount of sand paper and just lightly scuffed around the edge, don’t get into the carbon much.
For my touch ups, you can’t see them at 5 feet away. The ultra clear epoxy resin will make the “white” disappear, will dry to a gloss finish, and makes the carbon look black again. it’s not perfect if you run your fingers across it, because it still isn’t perfectly flat, just like using touch up paint. If you really wanted to get it flat you would need to block it with a small block and sand paper, maybe go over it a second coat to fill in any remaining low spot, then polish.
My .02, I would just dab the epoxy in and touch it up best you can. You will get more eventually. Removing the whole roof of PPF and blocking, polishing, or re clearing is a lot of work. If you get a couple years down the road and have several touch ups that you want to smooth out, then you will be half way there and can just re clear the roof.
FYI, thats more than clear thats chipped away. Thats part of the resin as well when you’ve chipped down do the composite. Clear isn’t that thick.
Fwiw, on my example it was the edge of the M Performance carbon front lip. It got bit by a driveway transition that caught me by surprise. I had 4 or 5 rock size chips, had to cut the PPF off around that area, and did exactly as I’m suggesting. I masked it off as a precaution, but did not touch up to the edge of the mask. Just brushed it, dabbed it in carefully. I’ve had people look at it from 3 feet and cant see it. you have to feel it to know its there.
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