Advice on paint defects

Crinkling

Definition

Swelling and Lifting of the substrate layers when new paint is applied. Problem may appear during the painting process or on drying.

20 x magnification

Causes

  1. Flash-off time too long when working wet-on-wet with some 2K-Products (recoating during Gel-phase).
  2. Recoating solvent-sensitive layers (NC/ TPA) with the wrong repair materials or when layers are too thick.
  3. Coats used as a sealer are not thick enough (sprayed too thin or when sanded down too far). 
  4. Substrate layers not thoroughly dried.

How to avoid

  1. Always keep to the recommended Flash-off times. 
  2. Carry out a Solvent Test, use the correct repair process and use the correct film thickness. 
  3. Use the correct Film Thickness as advised in the product technical data. 
  4. Ensure that the substrate is dry. (Re-bake or use IR lamps).

Repair

Sand down the paintwork back to a sound substrate. Rework using suitable Primer and Top Coats. (If necessary be prepared to strip back to a sound substrate).