crikey thanks guys i wasn't fishing for compliments! i just thought i'd demonstrate that mot fails due to rust aren't the ends of the world!
and i'm not trying to boast but that really is a bodge up job i've done, just rough patches shaped with a mallet and a block of wood, the whole car's a bit tatty and all the welding is behind the kit anyway. both sides were the same but that's only half a saturday's work (rushing a bit admittedly

was supposed to be going away with the missus for the weekend by lunchtime)
mig welding is WELL easy, seriously. i had a mate's set in my cellar from when he'd patched up something or other, and just decided to have a go one day, very easy to pick up! i just fiddle with the current setting and wire feed rate until it makes nice welds. it's only difficult if you're trying to weld to thin/rusty metal because you keep burning bigger and bigger holes thru it unless you use a low current setting - which makes it harder to get a nice continuous weld and you end up with a blobby lumpy line instead.
Widge: if it's out of sight then i'd brush on some anti rust primer from a tin. if you weld in new metal it should last ages anyway. an angle grinder is very useful to grind away rust so you can get a better weld
Geeman: if you pm me a postal address i'll make you one and send it, no problem whatsoever to do it, i'm just lazy (and a bit off e30s at the moment, i have not even touched the 335, it's had more than enough attention of late and now it can wait!!)
Ceasar Bob: happy to help you if i can!
Ziggy: half the reason i put this post up was to let you know why i haven't been in touch about your 320 recently! still happy to do it...
my final thought is if you can afford to have 2 cars GET AN OLD MR2 THEY ARE FCUKING BRILLIANT!

even if they do have a slight corrosion problem