hey guys sorry if this has been covered before
im after some advice good or bad on what you use or have used on inside of panels to prevent rust.
i used to use fish oil but there is a fair few others around now,its ment to be deoderised but it still stinks.
so im at the point where the body of the van is all primed and i wana get somethin in there as there is welds everywhere bofore it starts rusting.

cheers
ben