Remove a tracking marks

Hi,

Im trying of remove a tracking marks for a 3d integration test.

For a previous test i make a clean plates and it worked verry fine so i use it for all cleaning.

the final render will be a mini-car race, and the track are a table, with marks,
this is a video; http://vimeo.com/3206674

so i dont know the way a have to track al marks, any sugestions?