I had a Sharkskin cover from Westland and it was the best cover I ever had. Most water repellant and light weight. I too , did not use it for winter storage. Mine was grey and no trouble with color coming off. It came from Overtons and was a custom fit for my Liberator and fit better than ones I had made locally.

I have Sharkskin and have been very pleased. Water beads and runs off great and it is light weight and easy to work with. Fits my boat perfectly too.