I have used every kind of detailer on the ole Mach1 until I found DualPolymer. It cleans the dust and will bring a shine you have never see. Check it out at www.dualpolymer.com and use my code "porboy" for a 20% discount.
Info on 69 Mach1
Some information I have found on the Mach1 if you have more or better send it to Loren. During 1967-'68, Ford introduced a short-lived concept Mustang called the Mach 1. It was a slippery '67 fastback-based styling exercise shown around the country at new car shows, in car magazines, and at National Council of Mustang Club round-ups. The Mach 1 was a huge success--so much so that Ford would assign the name to the all-new Mustang SportsRoof body for 1969.