I had a "stainless steel" paint stirrer from Bunnings. In this case it was very similar to a "stainless steel" shower caddy ie not stainless steel. Some kind of chrome plating. With my BIAB I find a gentle stir (no splashing) with a brewing spoon until you get a pretty good whirlpool happening and then put the lid on and let it sit for 10 or so. The lid is more important than the stirring I think. If you dont put the lid on the cool air above the wort gets the thermal current going and it will swirl the hot break around in the kettle. No amount of whirl pooling will fix that. I was pretty amazed the first time I saw it happen.