[Zope] Access rule for Python Product

I need to run a function whenever my python product is published. This function will record the name os the user that viewed the object and the id of the object. If I was doing this all through the ZMI, I would create an access rule for each customer (folderish) object instance. However, I want this access rule built into my product. How would I do this? Thanks -- Chad Nantais Rednaxel Interactive