I wasn't very clear on that was I? Here is a better explanantion:

Removing surface rust from body panels
First, remove all the heavy surface rust with a DA sander and 80-180 grit paper. To remove surface rust, use naval jelly (jelled phosphoric acid) and steel wool.

1.Work in small areas, not larger than a square foot. Wear rubber gloves, and scrub with naval jelly and steel wool.
2.Apply jelly with 000 steel wool, rub it in, and allow it to set for a couple of minutes. Don't let it dry. Keep it wet, using a squirt bottle. For inclines, you can also soak some fabric in water, and lay it on the naval jelly.
3. Rub again with steel wool. Repeat a few times.
4. When finished, wipe off the excess naval jelly with a paper towel, squirt on warm soapy water, and dry thoroughly.
5. Wipe down with lacquer thinner.
6. Sand with 180 grit.
7. Use wax and grease remover, and then spray with epoxy primer.
8. From there, you can apply body filler (the epoxy may need to be scuffed, read instructions)
9. When the filler work is done, scuff with a red scotch-brite pad.
10. Then, apply two more coats of epoxy, followed by high-build primer.