Yep only stainless for me, as Jim says only need to worry about the weld line, point to watch though is S/S is not as strong as mild steel so go a bit thicker especially for bits like seat belt mounts, cheap stainless is readily available from your local scrappie just take a magnet and home in on commercial freezers, shelving etc if it is not showing signs of rust but is magnetic then you can get this for pennies cos as far as the scappie is concerned it is not S/S, steel £90 tonne,,,, S/S £650 tonne and the magnetic stuff is stronger as well, Rick