I’ve tried several different methods and none seemed to have really worked. I’m just trying to deter possums not harm them. The best thing I’ve used so far is Bunnings possum spray. Reasonably priced and easy to use. Just remember to spray again after it rains.
Sorry I'm late to this one - but it's very interesting. I love Possums but don't need anymore at my place
Apologies if this has already been called out but I would note that Possums are native animas and as such are 'protected' - you aren't allowed to kill them and they are territorial so caution must be taken if you are planning to catch and release. Check your local council for what you can and can't do.
Great points, @robchin. In fact, as far as I'm aware, you aren't allowed to catch and release them either without a permit in all states. You'd either need to apply for a permit or employ a professional with the required permit to relocate the possum for you.
Local councils are a great place to start as they'll be able to advise where to obtain the permit and they often loan or hire out possum traps.