It's nice except for the fact that the claws have miraculously been saved from any kind of battle damage. I shall assume they spent most of the campaign inside someone else and thus protected
Since they are lightning claws for a dread the damage will be painted on. It is hard to destroy activated power weapons. At least all the BL books I have read show as much.
Citadel's "How to paint Tanks" book is actually my source of inspiration. I was wondering if anyone had tried it though.