I use mouse traps inside the car - the best bait I have found is the square
cheese you get inividualy wrapped in plastic - like the stuff in a cheese
burgers.  All mice are different though, chockolate spead is said to be good
too.

"" Cross post from RAMVA below some more tips

Disconnect the battery - put moth balls or an electronic insect and mouse
repeller around the interior  - stuff steel wool into tail pipes and duct
tape across top of carb.

Vermin protection.    ""

go to www.camaros.net, go to the Tech section, and search for 'rodents' or
'mice.'
That site has a huge archive of advice, ideas, opinions, and there have been
several good discussions about rodents living in stored classic cars. It's
amazing
the ideas people have come up with to get rid of them....

Terry

    As a person who has a excessive amount of cars and trucks, Ill give you
my advice.

    Cats work the best with large number of cars stored outdoor. Yet any
car left open they will get in. Cat furr, and at times Cat Urinie will
be found in said cars. Male Cats like to spray.

    The only cats you can really keep inside a storage building or shop are
semi-domesticated house cats. Which may or may not be mousers. Some are
some are not.

    The best way to keep mice out is to find every enterance they use, and
use mouse poisions where other animals can not get to it. Then make sure
any food left in your building is keept in a refridgerator, including
any condiment packages.

    Next is to get a small rodent live trap and to bait it. The size live
trap used for chipmonks works well. For larger pests such as raccoons
live traps work very well. Make sure you check your trap every other day
and refreash the bait as needed.

    Mice will not only nest in your cars, they will chew wiring, nest in
your buildings walls, and go after paperwork. I have had titles
destoried by mice.

    I do keep 3 cats around my shop. 1 totally wild, and 2 semi
domesticated. None of them did I bring there, they showed up on their
own. Yet I do feed them. The two semi domesticated cats I will pet. They
do keep the rodent population down. Between trapping and nature's
preditors, I have reduced my rodent problems.

    I did have a fully domesticated cat that lived in the shop for over a
year. She would go out side at times. A customer who was not carefull
and was in a hurry ran her over in the driveway.
Charles

I put on the car cover, toss a fluffy blanket on top and then drape a tarp
over it so the tarp lays on the floor a little.  I fold back the excess, put
bricks on top, and then put 1 inch black-pipe between the crease of the tarp
and the brick.  (My cousin uses 3/4 inch PVC filled with sand.)  It
basically makes a nice heavy square around the car.  This year, I cut a hole
in the tarp, built a small wooden frame, stapled the edges of the opening to
the wooden frame, and placed a dual fan in it (one side blows in and one
side blows out).  Then, since a tricky mouse might get past a circular fan
blade in a square housing, I just put a piece of thick steel mesh across the
front of the fan (it's has slightly bigger holes than a window screen, but
it's still too small for a mouse.  Last year it was a little musty when I
pulled off the tarp, so I figured I'd let it breathe a little more this
year.

Bout the only thing mice will not eat thru, is wire wool.  Use it to
seal your exhaust pipe(s) .