Hi Duane041,
Thank you for your response. I have uploaded few additional photos of the 'mysterious rust/stain' issue. I have just removed the seat post in order to inspect the inner side of the seat tube and except for the grease,
there are no signs of rust inside the seat tube. Also, there are no bubbles as well :/ I've tried to remove it with a simple soap and water and it wont come off. What do you think?
Originally Posted by
duane041
Looks to me like a stain, too. Is there any bubbling in the area? Is the surface 'compromised' in any way (a chip, small crack in paint)? That's a weird place for it to just pop up like that.
Maybe a closer-up photo?
EDIT: The color looks like it's a yellow with a white pearl shot over it. Could be tricky to get a touch up to look good.