1) Sand 320 with a 3M stick pad that attaches to a drill

2) This will take care of the rust

3) Use bondo where the rust was to fill anything you can

4) Use 320 again to fine it

5) Use 400 to smooth it

6) Use 600 to smooth it even more

take it to the body shop to have it painted

You can use a 3M rust stripper that attaches to the drill anywhere expect the exterior body of the car. On the exterior body do not go lower than 320

good luck

• Door Bottom Rust Repair-- Any advice? - Eric Clark 2008-04-24 17:22:04 (151 views)
  • Repair detail (pic) - kfister 2008-04-27 01:19:57 (167 views)
  • This is what I did - 525i 2008-04-26 23:51:27 (106 views)
  • Re: Door Bottom Rust Repair-- Any advice? - daveinmiami 2008-04-25 13:46:40 (112 views)
  • How much work do you want to do? Any holes? - kfister 2008-04-24 21:50:40 (108 views)
    • The rust is new - Eric Clark 2008-04-25 16:01:33 (74 views)
      • Re: The rust is new - kfister 2008-04-25 17:05:16 (72 views)
        • Re: The rust is new - Eric Clark 2008-04-25 19:21:42 (73 views)
          • Same thing different media - kfister 2008-04-25 21:50:28 (66 views)
    • Re: How much work do you want to do? Any holes? - cloudnine 2008-04-25 10:36:19 (77 views)
    • Hey! I'm Oxford green too! - e34jef 2008-04-25 08:01:26 (71 views)
      • I am planning on painting the whole car next year - kfister 2008-04-25 12:20:19 (75 views)
  • Re: Door Bottom Rust Repair-- Any advice? - yaofeng 2008-04-24 19:14:31 (85 views)
    • Re: Door Bottom Rust Repair-- Any advice? - zorrow 2008-07-30 16:37:10 (32 views)
    • did that 4 years ago and still o.k. - shogun 2008-04-24 21:44:32 (92 views)
      • did similar on underside of sunroof - russell36 2008-04-25 08:59:07 (74 views)