I really like Vermont Natural Coatings Polywhey varnish but it settles in the can fairly quickly. I know I will have to stir for 20 minutes before use. Using a drill mixer is out because I don’t use that much and the stirrer would carry away too much. The pneumatic mixer from HF seems like it would introduce bubbles in my varnish.

question: can you throttle down those shakers to a more gentle motion?