How to Thin Bondo for Skim Coat and Get a Smooth Finish
Getting a glass-smooth finish on bodywork usually starts with learning how to thin Bondo for skim coat applications. If you've ever tried to spread standard body filler over a large, slightly uneven surface, you know it can feel a bit like trying to spread cold peanut butter on a piece of bread. It pulls, it leaves ridges, and it creates way more work for you when it's time to pick up the sandpaper. Thinning it out just a little bit changes the game, making the filler flow into those tiny pinholes and sanding scratches that a thicker mix would just jump right over. ...