Paint damage showing as irregularly shaped blister-like lifting of the paint surface.
- Mechanical damage to the paint surface (e.g., stone chips, scratches) causing moisture to penetrate to the underlying coats or metal substrate
- Poor preparation of the metal before painting. Insufficient cleaning (see entry on ‘Blistering’). Poor derusting or poor removal of metal particles left on the surface from sanding
- Flash rust formation, for example, on newly sandblasted surfaces
- Inadequate or missing cavity sealing (rust perforation)
HOW TO AVOID
- Repair damaged paintwork immediately.
- Thoroughly clean the metal surface with Glasurit 360-4 Metal Cleaner. Remove all rust by sandblasting to produce a bare metal substrate. Tin all welded seams.
- Prime all sand-blasted areas immediately.
- Seal and protect all areas as recommended
Remove paint system and corrosion (rust) from the affected areas (by sanding, stripping, sandblasting). Clean the area again with Glasurit 360-4 Metal Cleaner and Glasurit 541-5 Wax and Silicone Remover. Refinish using the recommended undercoats and topcoats.