yeah, I will keep them away from the sun for sure. Amazingly the previous owner of these sails and masts kept them so good that I am not even sure if I can do such a great job myself!
This is a very good suggestion about the wax - I will definetely apply it. The gear was used in a lake so there were no salt water and I am going to use it on a lake as well.
As I mentioned - the boom as well is very clean without even signs of sand on it.