Barely a drop in each pot and they immediately became smooth and clear.  My 20+ year old Les Paul was at the point the tone knobs started to have little effect on the sound and the volume knobs were crunchy with static.  This stuff made the thing sound brand new, major difference in the impact the tone knobs have on the sound, and silent operation on the volume knobs, no more crackle or static.  The knobs also turn smoother and easier than ever.