What typically causes water spots on a vehicle's paint?

Water spots on a vehicle's paint are primarily caused by exposure to insufficiently cured paint. When the paint on a vehicle does not cure properly, it can remain soft and susceptible to damage from external elements, including water. If the surface is exposed to moisture, minerals and contaminants can stick to the poorly cured paint. When the water evaporates, these residues can leave noticeable spots on the finish.

It's essential to ensure that the paint has undergone proper curing processes to avoid such issues. Curing involves allowing the solvents to evaporate and the chemical reactions to occur that result in a hard, durable finish. Without proper curing, the paint may not achieve its intended hardness and can become more prone to the formation of water spots when exposed to moisture.