Yeh cheers guys.
Kiri1 i am using (i think around about) a 2-3 grinder with a "heavy duty twisted wire cup" as they call them they are pretty much what you would use on a drill but a lot more heavy and rough. I tried using the drill technique and got pretty much no where :s i would get about 3-4 times the amount of work done with the grinder than the drill haha. Cutting out and welding new pieces back in is all good and well but i have heard the more you cut out the less original metal there is. Which weaken the over all strength. So i will cut the very worst bits out and just weld up over the others. :)
WARDY,
i think i will just patch this tub up get it on the road thrash it for when and what i need it for and then look for a much better shell and move on to maybe an sr or ca project.
Cheers