once the rust is ther the only real way to get rid of it is to cut it out completely or have it grit blasted then put new panels in

just it would be a shame to end up doing it again after all the effort u have put in

as u can see in my sig my mk1 escort
i restired it 2 year ago and it gets abused but all the rusty bits wer cut out completely and to this day there aint a bit of rust anywere

steve