Now the good part. Graphite applied to the bellhousing with a toothbrush. So how do I magically make the graphite dust stick to the alloy? Just spray some WD-40 or some other lubricant/oily aerosol spray on it and pat down the excess off with a rag. Then with a brush you can apply the graphite to it with ease.
Then place the board up against the engine and use the studs/dowels to hold the board in place while you tap it with a large face hammer. It's doesn't have to be a hard hammer of course. You're just tapping it to make a slight impression with the graphite.
Lookin good. 
