Are you worried about rust forming from the inside of your body panels and causing you problems down the road? There is an easy solution to the problem. 3M Cavity Wax Plus. This product is intended for professional use only, however, it isn't rocket science, and the average person with a little time to learn can do a professional job. Available on Amazon, and the applicators are an extra cost option. https://www.3m.com/3M/en_US/collision-repair-us/featured-products/cavity-wax-plus/
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