I'm working on my M543A2 wrecker restoration. The interior was heavily oxidized and I was expecting to prep and paint. I bought the rubbing compound shown in the attached picture and gave it a try. It took several coats but after trying several methods, a tooth brush worked the best. The glove box door has not been buffed out so you can see a comparison shot. The interior is original paint so I'm thrilled to be able to say the interior is really original. I bought this stuff at O'reilly's auto parts. I will paint the knobs since they are chipped up pretty bad.