Abstract
The recent high-resolution infrared images of the enigmatic cocoon stars in the Quintuplet cluster showing them to have ``pinwheel'' tails, and the deduction that they are colliding-wind Wolf-Rayet binaries, shows how far the study of colliding-wind dust formation has come since the first discovery of heated carbon dust around the classical WC9 star Ve2-45 (WR 104) in the early days of infrared astronomy. The formation of dust is the least expected, and hardest to understand, process attributed to colliding stellar winds, and direct evidence of the connection is only now becoming available. I will review recent work and consider systems showing a range of dust-formation phenomena, including the prototypical epsiodic dust-maker WR 140 and the variable dust-maker WR 70, also long studied by Virpi Niemela and her colleagues.
