I bought these with the intent of using them with my Army Painter paints as they require lots of shaking before use; however, they are so good at mixing the pigment back into the binding agent that I have decided to use them with almost all of my paints (including inks and washes). Paints that were once chunky and almost unusable have been restored by using these (and a dash of flow medium) and paints that have been sitting for ages have been brought back to life. While you still need to shake most paints vigorously these mixing balls help to agitate the pigments and allow them to flow better than regular shaking would allow. I highly recommend these for all miniature paints (Citadel, Vallejo, Army Painter, etc.) and will be buying more soon!