[68lemansman]

I was wondering what you guys do to your cars to make them more secure when you stay overnight at a car show and you have to leave the car outside all night. If you don't have a trailer to put it in or on a trailer. I know locking the doors but thieves get around that. I will be taking my convertible and I know in the last few years I've read on here people getting cars stolen even while still in the trailer. Any ideas I should use or to do to secure my car? Thanks. Jason