I recently used your carbon fibre skinning kit on a car product. I measured the resin to exactly 3:1 ratio in good conditions at the start of summer. 
The resin cured fine and I got it to a great finish. 

However 4 days after installing the product in the outside of the car the direct sunlight has caused the resin to form ripples in line with the carbon fibre. They are all equal straight lines. The resin has developed a greyish tone to it.

Can you explain why this has happened. I am working on two other car parts and I'm afraid to out them on the car in case the same thing happens.

Thanks
B

Just to add to the above...skinned parts are quite rich in resin content, so they are quite prone to resin shrinkage and the print-through effect mentioned by Hanaldo, with little exposure to the elements 

Overall, they aren't the most resilient to the effects of sun exposure.

If you post-cure them prior to performing the final flatting and polishing work, the shrinkage can be accelerated, which should bring on the rippled print-through surface you've experienced. You can then look to flat this back and finish the parts when the resin is in more hardened state. 

Coating with an auto-quality clear coat will help maintain their appearance beyond this, as already mentioned