Has anybody actually used the paint mixing lid that stays on the can? ...i.e. Rockler mixing lid...seal, mix, pour....likes , dislikes? I would use it for primer.
If you'll make 6 holes in the groove that the lid fits in, it will drain any paint or primer that gets in it. Then the lid will not be held up by a puddle of paint. The groove will be sealed by the lid and also the holes.