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removing rust from cb900F piggyback shocks

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seestheday

removing rust from cb900F piggyback shocks

Anyone have any tips?

I got these for a steal and love the look, but that rust on the top of the piggyback isn't looking too good.

I was thinking of just using some rust convertor and the painting the tops black.

Thoughts?

1981 CB750K with 900 cams
90K KM's, rebuilt head, rebuilt carbs, upgraded valve stem seals

My wife's recipe website that I'm trying to help promote: Strawberries for supper. Yes, I am a lucky man.

TOOLS1

Re: removing rust from cb900F piggyback shocks

Administrator

Rust converter should work, or carefully sand it off, and paint it. However it would be perfect project, for a sodablaster.
TOOLS

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1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)

Butcherblock

Re: removing rust from cb900F piggyback shocks

In reply to this post by seestheday

I would probably use a small wire cup/brush on my dremmel and clean the rust off, then paint the top black.

1982 cb750k 1982 cm200

seestheday

Re: removing rust from cb900F piggyback shocks

I would like to build a soda blasting cabinet, but space is a serious concern.
I think I'll sand/dremel it and then paint it. Thanks guys.

1981 CB750K with 900 cams
90K KM's, rebuilt head, rebuilt carbs, upgraded valve stem seals

My wife's recipe website that I'm trying to help promote: Strawberries for supper. Yes, I am a lucky man.

Lucky 1

Re: removing rust from cb900F piggyback shocks

In reply to this post by seestheday

"Piggyback shocks"???? What is that?

On a Roadstar Adventure.

Lucky 1

Re: removing rust from cb900F piggyback shocks

In reply to this post by seestheday

Clean the shocks with phosphoric acid and a tooth brush .
The mild acid turns iron oxide into iron phosphate. It stops the rusting process.

On a Roadstar Adventure.

seestheday

Re: removing rust from cb900F piggyback shocks

I think that may be the main ingredient in my rust converter product. I can't just get straight phosphoric acid anywhere I can think of.

Piggyback shocks are just shocks with an external oil reservoir. Cb900f's came with them stock.

Sent from my BlackBerry device

From: Lucky 1 [via Honda CB750'S]

Sent: Monday, June 10, 2013 7:10 PM

To: seestheday

Subject: Re: removing rust from cb900F piggyback shocks

Clean the shocks with phosphoric acid and a tooth brush .
The mild acid turns iron oxide into iron phosphate. It stops the rusting process.

Working on a CB750 Digger named Rover

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1981 CB750K with 900 cams
90K KM's, rebuilt head, rebuilt carbs, upgraded valve stem seals

My wife's recipe website that I'm trying to help promote: Strawberries for supper. Yes, I am a lucky man.

Matt Story

Re: removing rust from cb900F piggyback shocks

I think you can get phosphoric acid at Home Depot in the paint dept. I think its packaged as concrete etch or something. Also think I saw it at TSC as rush remover but it wad more expensive there.

Matt

shinyribs

Re: removing rust from cb900F piggyback shocks

Administrator

In reply to this post by seestheday

http://forums.sohc4.net/index.php?topic=122163.0;topicseen