For the past few weekends, I've been cleaning and painting the entire frame on my 84 Bronco. It was treated with an undercoating at the dealership when new, so is in decent shape. Most time was spent removing 20 years of grime, dirt and mud dauber nests. After cleaning, applying Ospho, then priming with Rustoleum, I used the Duplicolor spray-on bedliner to give it a textured look as I've done that on some other suspension parts prior to this. Here's a few pics of the progress:
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