Coating

Cracking

A network of small cracks appearing in the paint system after some time. The depth of the cracks indicates where the source of the problem lies - superficial scratches in the clear coat are a different problem than cracks that extend into the primer.

Cause

Applying a new system to a substrate that was already cracked - the varnish inherits the cracks in the substrate
Poor mixing ratio - too much hardener or thinner causes brittle, inflexible layers
Clear coat applied on too thick a base layer - lack of flexibility in a system that is too thick
Too thick top layer - thick layers crack under the influence of temperature changes and stresses
There is no elasticity additive for plastic elements - the plastic works and bends, the stiff varnish cracks
Adding layers to an old system without removing it - the increasing thickness leads to cracks
Primers not mixed sufficiently before use

Prevention

Carefully check the condition of the substrate - remove cracked substrates before applying a new system
Mix the ingredients in the right proportion using a scale and measuring cup
Mix or shake primers before use
Do not apply more material than recommended in the technical data sheet
Use the correct spray pressure
Always use a system with 2K elasticizing additive for plastic elements
Do not paint with subsequent layers without assessing the condition of the existing system

Repair

Completely remove the cracked system - do not cover the cracks with subsequent layers
Sand to a smooth, healthy surface
Identify and eliminate the cause before reapplication
Rebuild the system from scratch according to the technical data sheet
Use the 2K flexible system for plastic elements