Discovered RUST on one of my arches :-( Car is 55 plate

[Caveman_nige]

i the past when working on such rust areas i had to get a grinding wheel on it to get rid of the rust, a gentle sand will not do the job..

[rollercoaster63]

Thanks Deztroyer :-) Whats a lacquer and a what sort of pen would i need or is it just silver paint pen. Do i need to treat cause rust started

Cheers