Originally Posted by
zammykoo
That sums up what I was feeling while looking closely at this. Also not sure how I feel about knowing these could be caused by the previous owner's sweat. But I hope this is the worst of it. There are no other filiform corrosion anywhere else, just paint chips and scuffs all around.
How should I treat this? Just sand off the rust and paint? I have some black enamel automotive paint that I was thinking of brushing into those spots and wet sanding to make uniform.
I really appreciate your feedback!
Filiform corrosion isn't really progressive, unless the original precipitating ingredients are still present. You can sand it down and attempt to match the paint. On the hand, you have photos of its current state and can monitor its status, which is what I would suggest.
There is a way that seems to work for infiltrating the "spider veins" of filiform corrosion, but it is very involved, and I'm not sure it works any better than keeping the sweat off the bike.
I use clear nail polish or clear coat to keep the paint chips and such from rusting. A good synthetic wax can work for a while too. (My Allez is an exception (for me). It has a "matte/satin" finish which is not to be waxed, so I match it with a 80% flat, 20% gloss mix of black auto touch up paint, after priming. <sigh emoticon>) Matching paint colour rarely seems to work, though there are those on BF whose work is stunningly impressive.
(I blame auto-correct for "filo". That, and my appreciation for Greek food... I am rather peckish.)