Carbon vs. Aluminum
I am in the heavy aircraft overhaul bussiness with a backround in corrosion prevention and dissimilar materials compatability..These two items are very galvanic if allowed to touch "uncoated". Virtually all principal structural elements of aircraft where this is accepeted, such as wing panels,cowlings ect. require the aluminum to be well prepared with primer and topcoat, and the carbon panel is primed as well. the fastener issue is critical, as aluminum rivets will eventually disintegrate, so the standard practice is most often a titanium rivet,bolt,screw or hilok, with a special coating applied (usually aluminum to protect the aluminum structure from the titanium...so as you can see, it is an issue to consider, however in our world of RV's, I believe we are not going to see these conditions, as long as the carbon part is painted, the aircraft aluminum is at least primed, and I would recomend using stainless hardware. I think the carbon fairings will retain shape better than some of the glass stuff,and I would not be afraid to use them...may even be cool clearcoated. Just take a look ata Carbon Cub cowling some time.