I've had good luck lately using Naval Jelly to clean up the chrome on old bikes. I recently picked up a 1969 Schwinn Fastback frame. It has some light rust on one of the lower rails, but I'd like to salvage the original paint if possible.
Can I use Naval Jelly to kill the rust without destroying what's left of the paint?
No clue. Get that removed and use the jelly on that. Rust on the frame doesn't look too bad.
The stuff loctite stuff I have sitting on the shelf says it will damage paint. In practice who knows? I've never chanced it.
I've slapped it over paint I didn't care about and it didn't seem to harm it, on car frames etc. but nothing that was really meant to look good in the first place.
Maybe something like CLR or IronOut? If it's just rust on top of the paint deposited from something else rusting, they should take care of it without hurting the paint underneath.
I used navel jelly on the door hinges and rocker panel edges on my 2007 wrangler that had rust from stone chips. It did not damage the paint. I would not leave it for too long before washing it off and let it dry before repeating.
When put on over cheap enamel or latex you will see some change in the paint but on powder coats or OEM automotive type paints I haven't see any problem.
I put it on the corolla I had religiously and the paint was fine. Well, it was all faded with no gloss, so I might not have noticed a difference....
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