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Bondo, Sanding Sealer And Primer


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I recently stripped off the finish of a guitar body using a heat gun. I was fortunate enough to get down to the sanding sealer. I need to repair some dents and cracks with bondo. Do I need to seal over it before I prime or can I just sand everything smooth w/ 320 grit and prime over it?

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No matter what you use, you may see it show up in a few years because of the two different materials expanding and contracting at different rates.

I would sand to 400 minimum I think, depending on primer or no primer, and whether you intend to apply a few coats and sand level therafter before applying more color coats to help smooth it out and hide it.

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