How to Fix Rust Spots On a Car

Step 3 Grind Some More

After I got all I could with the sanding wheel, I changed over to a metal grinding wheel. When using this, be super careful because these can do a lot of damage. I worked really slowly so that I could get a nice finish on the metal. It was really good for taking the thick rust off and getting into those pits.

After 99.9% of the rust was removed, I sanded by hand (with 120 grit 3M Sandblaster sandpaper) to get a nice smooth metal surface.

If I wanted, I could have used Bondo to even out some of the dents, and fill the space where the paint is gone

Comments

[bluebelle]

i was just wondering what to do if the rust is all the way through. can you use bondo for that? the spot is about 14 cm by 8 cm.

[one_fake_user]

By a tube of rust converter. It converts iron oxide back into a quasi metal. It is a good idea to use it on any rusty area that you are not going to physically cut out and weld a new patch back into. If you don't the rust will most likely come back fairly quickly. Rust is like cancer, even the smallest amount of rust can turn into a horrible tumor. For instance before doing this step of the instructable I would still use rust converter to ensure there was absolutely no rust left. It isn't all that expensive either so it is a worth while investment. Hope this helps.

[one_fake_user]

correction "Buy a tub of"

[stinna2]

you don't actually need much the rust converter stuff is pretty thin and goes a long way