I use Lime Prime or Lime Prime Lite. Easy to use provided you don't make the mistake I did. Before the first Inters show I went to, machined the car and applied Lime Prime. It said to apply, allow to haze and buff. Which was wrong because it set like rock once hazed. Complete PITA to take off and I gave up because I was so frustrated by it. I now apply a small amount to the panel and then "work it in".