Thank you Snake! I hate when something like this happens, and I when I don´t could blame anyone else. I will try what you say, but probably I will leave it.
I managed to get a little drop of “Humbrol liquid poly” (thin cement) on the windshield of my current building.
I have try with a little drop of “pledge floor care” on it, but it is still very visible.
Any idea how to take care of this accident”??