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Rust and bare metal vs clear coating

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Rust and bare metal vs clear coating

Old 07-09-13, 04:42 PM
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Rust and bare metal vs clear coating

So I have my Ironman that has some rust spots that I am trying to get rid of and I was wondering if instead of painting over the bare metal spots where the rust is, I could clear coat over it instead?

If I can clear coat it will there be any problems with rust getting back onto the bare metal surface? Should I clear coat the whole bike? Would it be ok to use clear coat out of a can ie. Rustoleum?

Here are some picks of a couple of the spots, I am not finished completely so these are just for a reference. (Sorry for the quality of the pictures, all I had around was my iPhone.

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Old 07-09-13, 04:55 PM
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Unless you use a powder coat or a catylst (two part) paint, the paint will be porous and since humidity can get in (in vapor form) rust will start all over again. So no rattlecan paint I'm aware of will do the job on its own. Some vinyl wash primers and galvanizing primers are available at auto supply stores in spray cans and using that as a base gives much better results.
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Old 07-09-13, 05:21 PM
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As far as I know, most coloured Rustoleum does bind to metal and coats it and blocks it from rusting. I don't know about the clear coat though. But it should tell you the instructions on the can, whether you need a bonding primer coat and paint coat underneath or if this will go on bare metal. But why not sand and prep the area to smooth metal and feathered paint in the surroundings and finely put a couple coats of automotive grey primer and then some ivory-white automotive paint (at least on the white areas)? Then you can clear coat all you want. It'd look a lot better, I think than stark spots where the rust is or was.
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Old 07-09-13, 06:05 PM
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Bare metal clear coated with anything will always rust. Even clear powder coat will develop spiderweb type rust lines under it.
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Old 07-10-13, 08:56 AM
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use wet-or dry paper and get to clean metal then paint over it , generic color match for now,
Full refinish when affordable.

or are the rust patches a badge of Honor.. ?
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Old 07-10-13, 09:24 AM
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Since you are dealing with such small areas, consider using hardware store, over-the-counter epoxy or rust converter on the exposed areas.
But, I'm with fietsbob on this; If it were mine, I would want to remove all traces of the rust, then re-prime and touch up.
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Old 07-10-13, 09:31 AM
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Wire wheel in a Dremmel followed by rust-converting primer followed by automotive touch-up paint.
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Old 07-10-13, 10:03 AM
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That type of rust bubbling up is not good its deeper than just the surface, while you can sand paint and cover it up its going to be for the most part cosmetic in the long run.
But if you do fix I'd suggest applying whats known as Rust Converter you can find it in several places, this is applied to the rust do not sand it down first.
After is sets then you can sand down the spots you need to I'd apply some more after to protect that again from coming back then prime and paint.
Rust Converter will stop the rust I've used it on fences and autos works great makes it hard again stops the flaking like you have.
It may not be fancy but it gets me were I need to go.
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