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Technical & Reference Section => Tech and Restoration => Topic started by: Dredgy73 on February 16, 2021, 09:21 PM

Title: Rust on a painted frame
Post by: Dredgy73 on February 16, 2021, 09:21 PM: Hi all

What is the best way to remove rust on a painted frame?

I would like to keep it original so do not want to harm the decals....

Coke? Cif of something else?

Thanks
Title: Re: Rust on a painted frame
Post by: Midschoolfool on February 17, 2021, 02:12 PM: Neither.

You want to use CAP (Citric Acid Powder) or OA (Oxalic Acid)

https://www.amazon.co.uk/Citric-Acid-1kg-100-Grade/dp/B00DJI8RA0/ref=sr_1_6?crid=2TD8NNAIWCGUX&dchild=1&keywords=citric+acid+powder&qid=1613571112&sprefix=citric+acid+pow%2Caps%2C160&sr=8-6

Put the parts in a tub, put that in with water. Plenty of tutorials on the net.
Title: Re: Rust on a painted frame
Post by: Dredgy73 on February 18, 2021, 08:59 AM: Thank you 👍
Title: Re: Rust on a painted frame
Post by: CustardLips on February 18, 2021, 01:57 PM: Citric acid bath how to guide...

http://www.radbmx.co.uk/forum/index.php/topic,178383.0.html

:daumenhoch:
Title: Re: Rust on a painted frame
Post by: wildon on February 18, 2021, 02:33 PM: Oxalic Acid works
[attachment=1]
Title: Re: Rust on a painted frame
Post by: Dredgy73 on February 24, 2021, 06:18 PM: How long do you leave it in the bath for. Added more crystals, but after a day not much is going on!
Title: Re: Rust on a painted frame
Post by: BMX1973 on February 28, 2021, 02:23 PM: I normally put in 1/2 - 1 kg and leave for a day. Wipe over every now and again if you can. You will see it working as the rust spots normally turn yellow. :)