No, it is not illegal to ride on top of a car through a car wash, though I would not recommend it because it could be dangerous and you could get hurt doing it.
I would think any car could go through a car wash although I wouldn't run a convertible through one or one that leaks around the windows.
It is not recommended that you take a Jeep Wrangler through a touchless car wash with the soft top on the Wrangler. You can go through the car wash with the hard top.
Drive the car through a car wash that has a chassis wash and hope for the best.
Some are brushless.
It is not recommended for a laser wash. But a regular car wash that doesnt have alot of pressure behind it should work.
You do that when you wash you cloths by walking through a car wash fully dressed.
Yes, but I would not recommend it. It will tear it up.
Of course.
should you polish your car after washing it
I would look in the yellow pages for local car wash businesses. If you have a computer you can look under www.yp.com or let your fingers do the walking. During warm weather, on most Saturday's you may be able to find a local group trying to raise funds through a car wash.
Technically, you don't "drive" through a car was, the car is in neutral and you are moved through. But, as for your question, if the windshield is cracked enough for water to get through, I wouldn't do it.