Jim's (RapidEye) is the easiest and quite accurate way to go about it, an is the way I would go about it. As long as the paper is clean and fresh you should have no problem with it _resting_ on the surface of the mirror and dropping grime, look for something lint free. Greaseproof paper is good for this. Also you can easily align the mirror with the traced outline and snipped out center through the greasepoof paper.


regards