High Teck Tip of the Day, Body Filler Grinding Prep - Eagle National Supply

What’s the best grit to use on metal before applying body filler?

Old fillers needed a 36 grit scratch for mechanical adhesion. Body fillers today do not need a deep scratch to stick. Sand the metal with 80 grit and feather the paint edge with 180 before you apply filler for the best repair.

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