OA bath and after tips help

[Brian macumber]

I picked up this 94-95 chrome Dyno that is covered in rust. The spots I messed with either came off kinda easy with my thumb nail or 0000 stell wool. So I'm thinking that the rust should come off pretty easy in a OA bath. My question is what temperature should the water be tap or hot water. Then after I get done with that I have read about people putting stuff inside the frame to keep it from rusting. And I also want to do a painted frame also is it the same procedure as the chrome frame or would you recommend a different way for the painted one?

I want to keep the paint and graffics in tact on the Firestone.

 

[ingola]

Temperature is not that important because the water will get cold anyway. I spray the inside with this

May have different name in the us it's a rust inhibitor. Do the chrome the same way should save most the graphics.

 

[twojs.bike]

I am curious and would like to see your results. I have a chrome frame in similar condition.

 

[Brian macumber]

Does anyone know if hard water will affect the how the OA works? I put it in the bath yesterday around 10 am checked on it yesterday evening didn't really see a lot of progress. Rubbed everything down with a non-scratch pad added some more Ocylic acid checked again this morning and had a little more progress but nothing like I've seen other people have. How much do you use I used the same amount I read this guy use on the BMX museum which was 1 table spoon or 3 teaspoon. Any help appreciated.

 

[ingola]

Did you wash their parts first?

 

[us56456712]

Derust the chrome, wire brush, hard, with a 10,000 rpm grinder, sand where the wheel won’t get, clean with paint prep and use rattle can 2K epoxy primer. Epoxy sticks the best. Don’t bother with adhesion promoter on chrome. It’s difficult to cause abrasion on chrome with a wire wheel as the chrome is harder. Here is a rusty chrome frame treated this way.

 

[Brian macumber]

Did you wash their parts first?

No just cleaned the head tube and crank tube with degreaser probably where I went wrong

 

[Brian macumber]

Alright then took everything back out and washed everything changed out the bath with fresh water and OA. Going out to check it around 5 o'clock and see how it is going. I can tell that the chrome that didn't have rust on it does look brighter.

 

[Brian macumber]

Ended up getting almost all the rust off but still have some spots all over the frame.

Couple of before and after pics

Happy with the results of the rust removal but not sure about the shape of the chrome underneath especially the fork has some good scratches like it was dragged down the road. Not sure if I want to just leave it or paint.

 

[Brian macumber]

Any idea how I can remove this stuff or is there nothing?

 

[twojs.bike]

Are there instructions for the OA bath? I need to do this. Looks great to me.

 

[ingola]

Any idea how I can remove this stuff or is there nothing?View attachment 228620

You may be able to polish it off start with 600 grit and work up to 1000 then autosul and polishing wheel

 

[Brian macumber]

Are there instructions for the OA bath? I need to do this. Looks great to me.

I just did a Google search for bicycle OA bath and used the one at bmx museum https://bmxmuseum.com/forums/viewtopic.php?id=351132

 

[DesmoDog]

Ended up getting almost all the rust off but still have some spots all over the frame.
Couple of before and after pics
Happy with the results of the rust removal but not sure about the shape of the chrome underneath especially the fork has some good scratches like it was dragged down the road. Not sure if I want to just leave it or paint.

Chrome doesn't rust - the steel under it does. There is no chrome under the rust.

If there are pits they are in the base metal. Prep, prime, level, and paint IMHO.