Hey Exit
I am using odorless mineral spirits from Ace. I seriously tried to scratch my car again, and nothing.
Maybe is the color. As far I can remember everybody is using dark colors. You are the only one using a light color.
I bought professional almond paint for my bug. I am going to start to paint tomorrow. I will let you know what happens.

By the way, anybody knows how to get rid of masking tape from the car. The tape have been there a couple of weeks on the trim and now I can not take it out. I have tried alcohol and hot water also (the paint is fine) but does not work.