SO i was doing some research on several "rust paints"like por15 and rust bullet.But seen were people were having issues with peeling so it kinda scared me away from them.I ended up picking up a product called Ospho from ace hardware that is supposed to be a rust inhibiting coating.SO i gave this stuff a try and was so impressed with the results I couldnt resist making a thread.I never thought this stuff would do the job that it has so far.Hopefully It will be the last i see of the rust for a long time. Before During This was about 15 min after applying the first coat I lightly hit the floor with a wire brush on a drill before the application and blew out the residue. After 2 coats per instructions 3 days between coats and 1 day drying time after last coat I ran back over it with a hand held coarse wire brush to knock off the "powder" that the instructions mentioned to find the below results. I hope maybe this post will help someone else out like it did me!
Wow! Looks like that stuff did a great job of neutralizing the rust. Are you planning on repairing the perforated metal next?
Yeah,most of it is pinholes but there is a few places that could be an issue. Ill probly fiberglass the small areas and replace the larger spots with new metal.Then give the floor pan/inner panels a fresh coat of paint.
Been using Ospho for 25 or so years. Very good stuff. It soaks into the pores of rusted metal so all of the rust is converted, not just the surface. I still like to come back and coat with a good product such as Por-15 or Rust Bullet unless it's going to be top-coated.
I have an uncle that has been building Street Rods since I was a teenager. He got me started with Ospho (aka Phospho). He strips his old car bodies, usually by sandblasting or mediablasting. He then blows the car down to rid and sand or media. Next he sprays the entire body with Ospho, usually 2 coats. It may take him 6 months to a year to do the body work on this car now but the body is prepped and he does no other rust treatment whatsoever. He sands the body panels and primes right over the treated surface. I worked with him in his shop for nearly a year. I also follow all of his restorations as he does some fantastic work. He always has about a 5-6 year backlog of work. Every time he sees me he tries to get me to come back to work for him but I'm getting too old to do that work every day. I'll stick to running my shop. A little hard on the brain some times but not so bad on the arthritis.
heres a link to there site http://www.ospho.com/directions.htm I doubt fumes will be an issue after this stuff dried all the "acid" smell seems to have went away.And its paintable
cool I was just wondering....I used RUSTBULLET on PINKY (this winter) but this is definitely something to look at for a future project. Thanks
Looks good. Did you do anything with the pinholes. If not you might check out the tech section on fixing the trunk. There was some good stuff on fixing pinhole leaks with fiberglass and Rust bullit. http://mmb.maverick.to/showthread.php?t=35513
Could you or should you use on the under carriage of an older car--without taking apart etc? Would it help or even be worth it to stop/prolong rust if one wouldn't have the $ to get it dipped and redone? Just wondering.
Well, you're not gonna hurt it but as is the case with most street cars, it's probably coated pretty heavy with road grime and undercoating. You would be wasting your time spraying it over this kind of surface. If you did some extensive cleaning, then it would help. Of course you would need to come back and re-undercoat everything. Ospho will only last so long if you don't coat it with something.
