What is the recommended first treatment for small imperfections before priming?

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Address small surface flaws with filler or putty to create a smooth, uniform substrate before applying primer. Apply the filler, allow it to cure fully per the product instructions, then sand the area flush to blend the repair with the surrounding surface. This sequence gives a stable, even surface for primer to bond to and prevents imperfections from telegraphing through the final coat. Skipping curing or trying to prime over unfilled or unfinished repairs can lead to poor adhesion, shrinkage, or visible defects.