What might you use to remove rust stain on vinyl headlining?

[paulyv]

I think the titles say it all really - vinyl headlining on an old classic has some rust coming through, likely from surface rust on the steep roof above it. Any ideas as to why might get it off, or can I recolour it in place?

Thanks in advance

[somouk]

No point if there is rust the other side, it will come through again. Better to fix the reason and then have the lining re-coloured by a pro in place.