I'm doing paint prep on the airplane and I am using the Sherwin Williams Jetglo line of products. They have been great to deal with by the way, providing pricelists, colorcharts and even an application DVD. Before anyone starts shaking fingers in my face, I've painted several cars and a boat with great results, I'm using a HVLP turbine system with a full face fresh air supplied respirator and my medical eval and fit test are up to date...plus I'm a safety guy by trade no lectures. What I haven't painted is new aluminum. SW has a wash primer recommendation or a conversion coating recommendation aka Alodine. My question is generated by the amazing amount od opinions that say these steps are not needed if you scuff the aluminum and apply an epoxy primer. I just wanted to bouncd this off the forums since I'm sure there is someone with experience in both applications.