Corsa-B.uk - Vauxhall, Opel and Holden Corsa B Owners Club

Hi, I've just got one of these very cheap with a 4 inch pipe. It's very shiny, I assume it's aluminium coated. I've been reading that they rust very easily. Shall I fit it or not?

Also if I do fit it, what is the best way to prevent rust?

buy a stainless steel one, there not that expensive from ebay