What can result from improper application of body fillers?

Improper application of body fillers can lead to issues such as cracking, fading, or peeling of the finish over time. When body fillers are not mixed, applied, or cured correctly, they can fail to adhere properly to the substrate or may not cure evenly. This can create stress points within the filler that become visible as cracks. Environmental factors, such as exposure to UV light or moisture, can exacerbate these problems, leading to fading or peeling of the finish that covers the repair area. Proper application techniques, including correct mixing ratios, thorough surface preparation, and appropriate curing times, are crucial to achieving a smooth, durable finish that will withstand the stresses of both the environment and vehicle use.