I bounced my pristine RS1150 of some rocks the other week. The paint was badly scratched but the underlying carbon was unmarked. Alex Aguera says they build them tough.
I wet sanded the damaged paint to remove the hard edged scratches using 200, 400 and 600 grit, then polished with a car scratch compound. The end result is almost as shiny as the original surface and the black exposed bits look like graphic design features. I quite like it. I am thinking of spray painting it with a rattle can, but it looks fine at the moment.
I have used PC-11 and PC-7 epoxy paste from Bunnings for filling scratches and chips and fairly major repairs. It's easy to work with, sands well, and can be smoothed with a gloved finger wet with metho or even water.
For painting any of the high end rattle cans are fine (Duramax, Metalshield, Rustoleum).
Most foil damage is really easy to fix. The materials are carbon cloth and epoxy but the processes are pretty much the same as fixing a polyester surfboard. There's heaps of internet tutorials on how to handle everything. I bought a set of drug dealer scales for measuring out epoxy. Foil repairs usually require tiny amounts of resin and ultra-precise scales make it easy to do.
This link shows a lockdown project:
kiteforum.com/viewtopic.php?f=196&t=2407240&p=1108901
