Body Filler and Glazing Putty for Beginners: Mixing, Applying, and Shaping
Ace Auto Body Inc. · Hackensack, NJ Blogger preview Body Filler and Glazing Putty for Beginners: Mixing, Applying, and Shaping 📅 Published October 15, 2026 ✍️ KJ Lee, Ace Auto Body Inc. Introduction Almost every dent repair ends with filler. Many people call all of it "Bondo," but a body shop uses three different products , and each has its own job. Use the wrong one, or mix it wrong, and the repair can crack, sink, or show tiny holes through the paint. This is a beginner’s lesson. In Part 3 of our Kia Forte series , you saw this work on a real car; here we explain the basics behind it, from manufacturers and trade sources. At the end, in From the Shop Floor , KJ shares notes from about 20 years in our shop. Key Takeaways Fiberglass filler gives strength, body filler gives shape, glazing putty gives the finish , in that order. Mix about 2% hardener by weight (≈ 50:1), same brand. Never extra on a cold day. Thin layers beat one thick layer. No more than 1/4 inch of filler,...