Good news to report! I found some Dupont prep sol locally. I used miniature microfiber brushes and Qtips to carefully clean each of the white spots. I was able to clean all of them except for 4 (on the entire car). I even tried using a needle to tease the white stuff but to no good end. It simply taunted me back. These are the brushes I used: https://amzn.com/B017YBW5Q4 Do they make them smaller than this?
But, the weeks of hard work finally paid off. Both of my door edges were badly nicked. I rebuilt the edge with color and then dozens (literally) of thin coats of clear. I used one of the little Meguiar`s blocks to smooth and blend the new paint. I have to say I can`t even see the repair myself. And all of the road rash, although not perfect, is more than acceptable now.
So after doing all of the above I did a final polish with Meguiars Polish. I quickly cleaned out the remaining polish from the small chips while it was still moist. That went easily. I then tested the Blackfire Crystal and although it looked fine, I wanted to try the Meguiars Ultimate Liquid Wax. My earlier experiments showed that it does not leave a white residue either. It applies like a more conventional wax with a pad and then buffed off. I like the experience of waxing by hand and the fragrance of the Meguiars is excellent too - very, dare I say, sensual. I finished up last night and the car looks better than it probably has for 30 years or more. It isn`t perfect but nothing is. There are still a few places where I might come back later and rework.
So one question I have, the front nose of a Porsche 911 takes a beating. I wonder if a simple clear vinyl "bra" on just the first 12" or so would help minimize future rash. I did a little research but everything I found was like a full front end clear bra treatment. I don`t want to go that far, just a simple 12" stripe across the hood. Anyone have experience or thoughts about this?