i did it to my somewhat abused chassis on me 110 an it dont seeem to rust any more . it works best iff you shot blast the rusty bits off an only paint the bits you need to. It neeed a repaint bout evy year tho if you abuse yer trukk!!
top tip wear a good mask when removing rust a a pair o googles keeeps all manner of **** out yer eyes.
Thanks for the advice These Disco's are really long when you are underneath. But I,ve started painting from the back I should be finished in ....well I,ll let you know in a month or so!