Need some rust help

[Dejammey]

What should I do to remove all this surface rust on my 75 roof? I have been using 80 grit sand paper but that's not making much of a dent. Please help.

[FutureMan]

you sure that's only surface rust?

[esty]

that is just surface rust but it's at the stage where if left untreated will soon get all the way thru...sand it smooth or as smooth as possible then treat it with some brand of phosphoric acid...available at home depot, walmart, etc...name brands include rust no more, etc

spray it on, use a scuff pad to scrub it in....let it sit a few minutes, wash it off then prime the areas...the acid will turn in black or perhaps, dark green....that's normal

[RoundelRoundie]

try a wire wheel to get the rust off if the sandpaper isnt cutting it, then do as esty said with the phosphoric acid. some of the acid metal treatments will actually replace the rust with zinc and it give it a whitish appearance. with or without zinc, they both work. top coat it quickly after treating it.

[2002Targa]

Ace hardware or probably home depot in the paint isle. Get the OSPHO , green liquid in a clearish plastic jug. Also get some heavy duty gloves and some good eye protection. It's the phosphoric acid that the others mentioned and works great. Goes on like water, work it in but read the directions also.

TK

[Dejammey]

Thanks guys I will run bye the store when I get off and pick some up. I think I will wait to do it till I get the rest of the car prepped for primer that way I can just spray it once I get the rust off.