My bike got rained on for only 5 minutes and there's rust (pics)

[He Man]

Dried oxidation ran onto your plastic fender dried oxidation, i assume in flakes/grains/powered form, which is totally inert managed to give your fender streaks that look like a liquid rolled down.

Will ya people just clean your bikes already. Its a motorcycle, not a ice sculpture. You just need to find hte right stuff to clea nit. S100 isnt a cleaner, its a miracle in a can, and i wont clean properly. You need a tough buffer to get into the clear coat. Just try a bunch of different things before you go slitting your wrist man. 

I ride in NYC with the most toxic and disgusting pavement ever. Acid rain, bird poo, dogs pissing, the worst kind of salt in the winter. You need a good degreaser, usually the most badass sounding shit is the best.
I had some wikid spots on my rims, Brake fluid wouldnt wash it, WD-40 wouldnt wash it, Simple Green concentrate wouldn't wash it, Paint thinner woulnt wash it. You have to have some really harsh chemicals to pierce todays clear coats. Only soaking your fender in brake fluid for hours or paint stripper, vinegar will get it stain like that. So seriously, go buy some differnet products, and buff it out.

You guys make my bike look like a homeless whore.

[DrNo08]

Dried oxidation ran onto your plastic fender dried oxidation, i assume in flakes/grains/powered form, which is totally inert managed to give your fender streaks that look like a liquid rolled down.

- It's very difficult to grasp. (/sarcasm)

Oxidation from metal bits ran down the fender to which it dried leaving the marks behind after cleaning.

[He Man]

Metals that are highly reactive to air will rust (oxidation). this causes the metal that was once very reactive, to become stable because it enters a lower energy state. The two metals that are in that area of your bike is Aluminum and Iron. Both Aluminum Oxide and Iron Oxide are not corrosive to my knowledge.  In fact Aluminum Oxide is what most sandpaper is made of, which we all use to smooth out paintjobs.

Also for any liquid to leave a streak like that, it would have to be either a homogeneous solution of corrosive elements, or a high concentration of the corrosive element traveling in a liquid medium.

And if your saying you somehow have a highly corrosive metal oxide, it would have to be a in a pretty damn high concentration if it isn't soluble in water or it would have to dissolve in water. Oxides generally do not dissolve in water, Aluminum Oxide definitely does not dissolve in water.

So seriously. stop  and wash your bike. Its a motor vehicle not jello.