fixing rust spots
07-03-07, 01:59 PM
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fixing rust spots
What is the best way to prep an old steel mtb frame to get rid of rust? It is a beater so I'll probably just use touch-up paint once the spots are cleaned up.
Sorry if this has been done to death...
Sorry if this has been done to death...
07-03-07, 02:11 PM
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Personally, I swear by phosphoric acid (Naval Jelly), IF you can be certain that you'll get it all off. Phosphoric acid convers the iron oxide into iron phosphate, whcih is a rust preventative and darned good initial primer. However, that IF is significant. If it stays in there (in a crevice) or under the paint it will keep etching things and can lead to embrittlement.
07-03-07, 02:21 PM
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sand/media blasting is likely the best way to prep a frame for paint however if it's an old frame and you're paying someone to do the blasting for you it may not be worth it.
07-03-07, 02:34 PM
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I was thinking oil and steel wool and elbow grease. Then touch up with something from the hardware store...
07-03-07, 05:44 PM
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hm...... where is the popcorn smiley?
07-03-07, 09:13 PM
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do whatever is easiest and removes all of the rust. i've used dremmels for larger areas of surface rust. for small chips caused by rocks i use a needle to scratch out the rust.
yes, it will help with durability to a degree
Originally Posted by Junkdad
Once I get the rust off, I should spray primer before paint, yes?
Last edited by benda18; 07-03-07 at 09:18 PM.
