Painting over rust

[Tommy4949]

So I am going to repaint my Jeep with rattle cans, (see my other post), and also need to fix quite a few rust spots. The largest rust spot is about an inch in diameter. In other posts, you guys have suggested a few very nice products for repairing rust, but since I am using the poor boys method of painting with the rattle cans, I don't want to spend a lot fixing the rust. I don't want the rust bleeding through for at least 2-3 years though. I'm also going to stop the rust and undercoat underneath. What's the best cheap and easy way to fix the rust so I can paint over it and make it look nice?

I also have a 2" diameter rust hole in one of my rocker panels. What is the best cheap and easy way to fix this before I paint it?

 

[Trail-Axe]

So I am going to repaint my Jeep with rattle cans, (see my other post), and also need to fix quite a few rust spots. The largest rust spot is about an inch in diameter. In other posts, you guys have suggested a few very nice products for repairing rust, but since I am using the poor boys method of painting with the rattle cans, I don't want to spend a lot fixing the rust. I don't want the rust bleeding through for at least 2-3 years though. I'm also going to stop the rust and undercoat underneath. What's the best cheap and easy way to fix the rust so I can paint over it and make it look nice?

I also have a 2" diameter rust hole in one of my rocker panels. What is the best cheap and easy way to fix this before I paint it?

Treat a 12 foot square area for only $18.00. This stuff works great! It is UV sensitive, and needs to be top coated when it is almost dry. When you can run your finger across it with some resistance, or a tacky feel, then top coat it with Rustolium. http://www.por15.com/prodinfo.asp?grp=SSK&dept=11

 

[dave92cherokee]

There's 2 ways I know of to take care of rust. 1 and the best by all means is grind away all the rust until only clean metal is left and patch the hole by welding in another piece of metal, and 2 (haven't tried but is possible) get some rust converter which is usually available at parts stores. I haven't tried the rust converter before but if it works would be the easiest and cheapest way to do it.

 

[xalexjx]

cut the rockers out and get some steel to fit in there. if you get it all cut out and ready to go bring it down to my shop and ill weld it in for ya

 

[94XJ2door5speed]

Treat a 12 foot square area for only $18.00. This stuff works great! It is UV sensitive, and needs to be top coated when it is almost dry. When you can run your finger across it with some resistance, or a tacky feel, then top coat it with Rustolium. [URL="http://www.por15.com/prodinfo.asp?grp=SSK&dept=11"]http://www.por15.com/prodinfo.asp?grp=SSK&dept=11[/URL]

POR 15 is the best way hands down to convert rust back to real steel. It wont provide you with a smooth surface but it will convert it.

 

[T3hk1w1]

The only way I have found that will not result in rust bubbles under the paint is to grind it alllllll off. But then my jeep had been rusting for over 35 years, so maybe it was having trouble breaking the habit...

 

[JEFF]

http://www.greatlakes4x4.com/attachment.php?attachmentid=20200&d=1201800263

This is what I did with my rusted rockers 2x4 tube capped at the ends. It started out as a small rust hole but the more I looked the more rust I found. If you do it right the first time you won't have to go back and do it again, Painting over rust just makes it rust faster.

 

[JeepDawg]

Since there hasn't been too much action on this thread for a few days, I wanted to take the opportunity to ask a somewhat-related question.

Has anyone simply painted the undercarriage with POR-15 in order to prevent rust? If so, how did it work out? Any suggestions? Since I live in the rust belt (i.e. Northeast), it seems to me the logical way to prevent rust from attacking.

Any feedback welcome.

 

[Trail-Axe]

Has anyone simply painted the undercarriage with POR-15 in order to prevent rust? If so, how did it work out? Any suggestions? Since I live in the rust belt (i.e. Northeast), it seems to me the logical way to prevent rust from attacking.
Any feedback welcome.

That would be a good way to go, but POR-15 will not stick to painted surfaces. It will just peal off. If you are not using it on rusted metal, or sandblasted metal, you will need to use a POR-15 Tie-coat primer over other painted surfaces, and if you are using it on bare metal, you will need to use the POR-15 Metal Ready to prep the surface and provide a good base for the POR-15 to bond to.

Once POR-15 has bonded with a surface, preferable a surface that has been sand blasted, or rusted, it bonds like nothing else! I applied it to my bumpers, and needed to remove it from a few areas for welding and it resisted a wire wheel in my angle grinder like it was steel. It had bonded to the metal like an ink stain on your skin. I really had to work at it to get the metal exposed. So POR-15, when applied the way they suggest, is probable far superior to powder coating, and would resist rust like nothing else I have ever seen or used.

 

[Slo-Sho]

Phosphoric acid, an old body mans trick. It is sold as a diluted greenish liquid at Advance in a bottle called "The Right Stuff". It chemically neutralizes the oxidation of the metal.