It would be a hell of a temporary roof to cover the main mast - over 200' from the dockside, and the structure would then have to take up massive width to support the roof. Why hide such a beautifull man made wooden structure, when she was built to withstand all weathers. No - leave her as she is. All strength and beauty, fearsome from a distance, georgous up close. Just like my own Prize - 28 years of marriage.
The masts are now Victorian cast iron replacements, and also one of her most elegent aspects, as is the gracefull geometric rigging, which we shall all eventually know intimately. Why the hell would you wish to cover all that up. It's like putting a paper bag over Jane Seymores head.
Regarding idiot arsonists and The Cutty Sark, that was disgusting. Victory is within a Naval Dockyard and has substantially more security. I also think she has sprinklers fitted in pertinant places, to prevent such a situation. Also, builders were working on The Cutty at the time, and most of her major timbers are at Chatham - I've seen them on the dock. Paitently awaiting replacement of the devestated hull, before refitting.
I do understand your sentiments though.
See Ya
PS. I thought Victory had lightning conductors fitted.