It might sound obvious but, steve... why dont you check these Pandas for rot before you buy them!!! I dunno, bloke has gorgeous green Panda, swaps it for even more gorgeous black panda.... then buys a 750 that rotten.... got it, masochist! LOL! That Sisley looks nice!
Just to cheer you up, heres a couple of pics of real rust.... this was worse than it looked too, and 2 days later all fixed up and a new outer sill too, was my old Westie back in about 1996.