I have a paint shop, body shop and powder coating shop with tire changer and wheel balancer. I've got new powder coated wheels, tires mounted and balanced, I'm waiting for a customer and weights are falling off the wheels. After several people commented on the wobbly wheels, I had to ditch the remaining weights. I can't risk If you buy them, press hard. The surface should be clean, but even a new surface seems to require a good print.