Low VOC Dark Red Car Paint for Metal Plastic Fiberglass

Q1: Why is primer necessary before topcoat?

A: Primer improves adhesion between substrate and topcoat, seals the surface to prevent metal corrosion, and creates a uniform base to ensure consistent color and gloss of the topcoat.

Q2: What are the common types of primer and their uses?

A: Epoxy primer for bare metal anti-corrosion sealing; 2K surfacer primer for leveling putty and filling minor defects; 1K primer for quick repair and base leveling.

Q3: Can topcoat be sprayed directly on primer?

A: The primer surface must be wet-sanded with 800–1200 grit sandpaper and fully cleaned of dust and grease before topcoat application to ensure adhesion and smooth finish.

Q4: How long to wait after primer before topcoat?

A: 2K primer is generally sandable after 30–40 minutes at 25℃ and can be topcoated after sanding and cleaning. Do not leave primer exposed for too long to avoid contamination.