Peeling – Loss of adhesion or separation of paint film from substrate.
Cause: (A) Improper preparation of the substrate (sanding and cleaning)
(B) Omitting or applying an incompatible undercoat to a specific substrate (e.g. aluminum, galvanized, plastic, etc.)
(C) Insufficient flash/dry time or exceeding the product’s recoat time.
(D) Insufficient film thickness of undercoat, or topcoat or clearcoat.
(E) Clearcoat finishes: 1) Using solvent to clean basecoat before clearcoating. 2) Sanding base before applying additional base or clearcoat. 3) Basecoat applied too dry. 4) Clearcoat applied too dry. 5) Baking base before applying clear. 6) Using fisheye eliminator in base. 7) Incompatible clear. 8) Use of incompatible “adhesion promoter”. 9) Excessive basecoat film thickness. 10) Over or under reduction or incompatible reducer for basecoat.
Repair: (A) Remove the finish in affected area, featheredge, and refinish.
(B) Or, strip to bare substrate and refinish.
Prevention: (A) Clean and prepare all substrates according to product recommendations.
(B) Use recommended primer (plastic parts may require special primer or adhesion promoter).
(C) Recoat within recommended minimum and maximum recoat times.
(D) Apply sufficient amount of coats for recommended film thickness.
(E) Follow basecoat/clearcoat applications using compatible products (e.g. recommended reducers or no reducers for many clearcoat products.)
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