Well I've got rust in my roof that I'm gonna be cutting out, it aint a big job, is it?

I've had to replace floor panels, arches, cills etc which in my opinion is not a great deal of work/expense and the car is gonna be worth more after it. You'll probably find alot of S2s out there advertised £2k plus in need of this kinda work too! If the tin rot was to be hiding in places structural and everywhere else then it'd be of to the scrappies.