Auto Refinish

• WB-340 Seamless Clear Coat | The 2nd-Generation Upgrade for Invisible Blending Repair

  

  Nov 06, 2025

  1. Breaking the “Blend Edge” Problem in Automotive Refinishing In traditional car refinishing, one of the biggest challenges during clear coat application is the visible blend edge when spraying over an un-sanded old paint surface. This often leads to peeling, poor adhesion, or uneven gloss — all of which compromise the finish quality and reduce repair efficiency. WB-340 Seamless Clear Coat was developed precisely to solve this industry-wide issue. As the second-generation upgraded version, it features an advanced resin system and enhanced adhesion technology that allows new and old paint layers to naturally blend into one flawless surface, achieving a factory-quality finish without visible repair edges. 2. Core Advantages The strength of WB-340 lies in its ability to merge seamlessly with the existing paint surface — delivering an invisible repair effect both inside and beyond the blend area. Perfect Integration: Whether blending inside the sanded area or extending slightly beyond, WB-340 creates a smooth, boundary-free transition after polishing. Texture Matching: By adjusting viscosity, users can accurately reproduce the OEM texture of different vehicle types — • German cars: heavier texture (use as is, no thinner needed) • Japanese cars: finer texture (add thinner as required) Fast & Easy Application: Quick-drying performance makes it ideal for localized spot repair when used with 1K basecoat systems. High Transparency & Strong Adhesion: Can be applied directly on the cleaned and polished old surface, ensuring excellent adhesion, high gloss, and superior transparency. 3. Simple Application Steps for a Flawless, Invisible Finish WB-340 is user-friendly and highly tolerant — perfect for both professional and semi-professional painters. Step 1: Surface Preparation Sand the old paint surface with fine sandpaper and remove impurities. Apply and level putty, then sand smooth after drying. Mask edges with tape to ensure clean lines and minimal break zones. Step 2: Primer Application Apply primer and dry thoroughly. Sand to smooth using P400–P600, then finish with P2000 dry sanding. Polish surrounding areas for a natural blend transition. Degrease and remove dust before applying basecoat. Step 3: Clear Coat Application Mixing ratio: Clear coat : Hardener : Thinner = 100 : 50 : 0–10 (Recommended hardener: WB-345) Apply 1.5–2 coats with spray pressure 1–1.5 kgf/cm² and nozzle size 0.4–1.0 mm. Allow 2–3 minutes flash-off between coats before baking. Bake at 60 °C for 15 min for polishing, or 60 °C for 60 min for sanding/rework. Step 4: Polishing & Finishing Use a blending thinner to fine-tune the transition area. Test both: External blend: spraying beyond the old clear coat area Internal blend: spraying within the sanded area After 15 min baking + 10 min cooling, polishing reveals a completely seamless finish — no visible edge, even under reflective light. 4. Safety & Technical Notes 2K PU hardeners are moisture-sensitive — always seal tightly after use. Ensure the spray system is completely dry to prevent paint defects. Always wear protective masks and ensure proper ventilation. Avoid air drying; use infrared or temperature-controlled baking for best results. As conditions vary, conduct a compatibility test before large-scale application. Technical support is available for specific requirements. 5. Conclusion Whether for partial spot repair, used car refinishing, or premium body shops, WB-340 Seamless Clear Coat helps painters eliminate concerns about blend edges, drying times, and color mismatch. It allows professionals to focus on restoring a perfect glossy surface — delivering faster, higher-quality automotive refinishing results. WB-340 — the ultimate solution for efficient, flawless automotive repair.  

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• Professional Guide to Automotive Refinish — Simplifying Perfection with WISETONE PLUS

  

  Oct 22, 2025

  In the world of automotive refinishing, quality starts from the process. Every stage — from metal protection to the final polish — determines the coating’s durability, gloss, and color accuracy.At WISETONE PLUS, we combine advanced materials, intelligent color systems, and strict process control to help refinishers achieve factory-grade results with consistency and efficiency. 1. Epoxy Coating — The Foundation of Protection Epoxy primers are essential for corrosion resistance and adhesion.Our products — BP600, BP500, and DW50 — offer different performance levels for various repair needs: BP600 for maximum anti-corrosion strength, BP500 for a cost-effective balance, DW50 for lightweight, economical protection. A proper epoxy layer ensures long-term durability and prevents rust beneath the paint system. 2. Putty Application — Filling and Leveling Putty plays a vital role in surface correction and substrate matching.WISETONE PLUS offers multiple types — from standard body filler and fiber putty to high-temp formulas — suitable for different materials and climates.Key selection factors include fast drying, heat resistance, and plastic compatibility, ensuring smooth sanding and a perfect surface ready for primer application. 3. Primer Surfacer and Color Coating Our primers such as DW60, 2700, 2112, and 3111 provide strong filling power and isolation, preventing defects and ensuring uniform color coverage.For color layers, WISETONE PLUS features three tonner systems — DAWANG, AGP, and PLUS — each designed for specific accuracy levels.The PLUS system integrates a 5C spectrophotometer and a database of over 100,000 color formulas, ensuring precise matching across global automotive brands. 4. Clearcoat and Finishing Clearcoat is the key to gloss, hardness, and protection.WISETONE PLUS offers various grades — from 155 to 5500 series — adaptable to different drying speeds, budgets, and weathering requirements.After spraying, bake at 60°C for 30–40 minutes or air dry for 2 hours before polishing.Ensure cooling below 40°C before buffing to avoid shrinkage or swirl marks. 5. Quality Inspection — Excellence in Every Detail Before delivery, every panel must meet strict criteria: Smoothness: no unevenness or texture. Color Accuracy: ΔE ≤ 1.0. Gloss Level: ≥90 at 20°. Defects: dust-free under 50 cm visual check. WISETONE PLUS guarantees OEM-level refinishing quality, giving every surface the brilliance it deserves.  

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