What's the best process for paint repair on aluminum parts?

by admin on August 26, 2010

I have a front wheel hub that had several finger nail size paint chips on it. It’s a Spinnery Xaero hub and it appears to be bad prep work at the factory. They’re out of warranty so I need to touch them up myself. I’d like to use a brush not spray. After I clean the light corrosion off with light sanding what is the best process (and paint) to prep & paint so this will not chip again?
Yes those are the wheel… So clean it, heat to dry and oil paint is all? That’s easy enough.

After the light sanding, wipe the area to be painted with a lint-free rag soaked in naptha or mineral spirits. This will get any oil off the metal.
You should look at a hobby shop for some oil based paint in a very small bottle. Make sure it’s oil based and not acrylic.
You might want to use a work-light with a 75 watt bulb to heat the hub for a few minutes before painting, that way there won’t be any moisture condensing on the part.
I have found that using a lamp bulb to heat the metal makes the paint more scratch resistant.

PS-I’ve never heard of Spinnery Xaero. Do you mean this :

http://www.spinergy.com/Bicycle/xaerolite.html

?

{ 1 comment… read it below or add one }

AviationMetalSmith August 26, 2010 at 6:07 am

After the light sanding, wipe the area to be painted with a lint-free rag soaked in naptha or mineral spirits. This will get any oil off the metal.
You should look at a hobby shop for some oil based paint in a very small bottle. Make sure it’s oil based and not acrylic.
You might want to use a work-light with a 75 watt bulb to heat the hub for a few minutes before painting, that way there won’t be any moisture condensing on the part.
I have found that using a lamp bulb to heat the metal makes the paint more scratch resistant.

PS-I’ve never heard of Spinnery Xaero. Do you mean this :
http://www.spinergy.com/Bicycle/xaerolite.html
?
References :
I painted aircraft for the US Navy. Navy aircraft require wiping the metal clean with a Naptha soaked rag before painting.

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