How do you guys bust rust this bad?

[Oldbikeguy1960]

You want to limit it to a short period, Naval Jelly I believe says no more than 15 minutes for chrome or it will discolor.
Oxalic Acid is much better for cleaning chrome without scrubbing.

 

[Oldbikeguy1960]

"Coke, the pause that refreshes? Things go better with Coke?" Pepsi....."Come alive, Your in the Pepsi generation". Lets think up a jingle for this, "plop, plop, fizz, fizz, "oh my, what happened to thiz?

I just got a 2 disc DVD of commercials from the 1950s-1970s. I am sure all those are on there!

 

[Oldbikeguy1960]

Man, we are doing this on two forums. I thought I was just confused!

 

[GTs58]

I'd do an acid soak. Clean up around the seat post and then seal it off with some paraffin wax from an old birthday cake candle. Flip the bike over and get a cup of undiluted vinegar and pour it in the seat mast from the bottom bracket. Let it soak for 6 hrs or so and see what happens. Do the same on the BB cups getting the vinegar around the inside of the seating area.

 

[Bike from the Dead]

Man, we are doing this on two forums. I thought I was just confused!

Haha, yeah I tend to post the same stuff on here and RRB most of the time. I know there's a lot of folks using both forums, but not everyone. I always figure the more help I can get, the better. Sometimes I get a little confused by it myself!

 

[Bike from the Dead]

I'd do an acid soak. Clean up around the seat post and then seal it off with some paraffin wax from an old birthday cake candle. Flip the bike over and get a cup of undiluted vinegar and pour it in the seat mast from the bottom bracket. Let it soak for 6 hrs or so and see what happens. Do the same on the BB cups getting the vinegar around the inside of the seating area.

Not going to lie, out of all the solutions provided so far, this one sounds the most... confusing and difficult. I'd like to try some of the other ideas out first, but I appreciate your advice, and I might just try it if nothing else works.

 

[Oldbikeguy1960]

Not going to lie, out of all the solutions provided so far, this one sounds the most... confusing and difficult. I'd like to try some of the other ideas out first, but I appreciate your advice, and I might just try it if nothing else works.

Would it help on the confusion if you plugged the end of the tube with a cork instead of the wax?

 

[J-wagon]

Oh man, rusted seized seatpost especially that one smushed way down is the worst. Looks like lots of post surface area inside the tube. Perhaps make vertical cut in post running from between seattube slot up to top of post, like with dremel cutting wheel or similar. Squeeze post betwn vice or similar. Resulting flex should free up some area. And can drip some solution into the gap too.

Or if you have long cutting blade, carefully cut vertical line inside post (careful to not cut seattube) and then squeeze to break free as much post surface contact area away. Then solution soak and twist as usual.

I've done this with seized interfaces with success. But not smushed down like yours.

Good luck!

 

[Oldbikeguy1960]

Haha, yeah I tend to post the same stuff on here and RRB most of the time. I know there's a lot of folks using both forums, but not everyone. I always figure the more help I can get, the better. Sometimes I get a little confused by it myself!

The funny part is that we are on both forums doing this in real time!

 

[GTs58]

Would it help on the confusion if you plugged the end of the tube with a cork instead of the wax?

Sealing up the top of the seat mast around the seat post so the acid will not drip out when the bike is flipped over is the objective. Seal it however you think will work so the acid will stay filled up all around to the end of seat tube. It's actually pretty simple. Or throw the whole frame in a hot mix of OA.