[HummerJim]

I would NEVER use nail polish remover on the finish of a car! What type of marks are you talking about. Are they swirl marks or something that you could use rubbing compound on, however, a little rubbing compound goes a long way. If it's swirl marks, I like Maguires swirl remover, often used on classic cars and available online or in many automotive departments. For tar I use WD40 on a watered down rag, and for bugs nothing beats Coca Cola.