Renovating a top hat

[the_imperialist]

Hello all,

I have just recently come into possesion of an older top hat, it still has considerable life in it, however, the shellac frame (I am assuming) has given a little i.e. sorta like a slight fold in carboards you find. I was just wondering, is there any method, short of getting it completely renovated (being in New Zealand, I don't know of any outfitters), that can help strengthen the shell?

Regards,
the_imperialist