De-trickulatatin a header coating conundrum.

Let me preface this thread by saying that I am fairly certain this is a process failure on my part.
First I blasted these super bare with sand blaster. Then I hung them in the sun, filled my paint gun with denatured alcohol and soaked the bejesus out of the headers. Let them dry for an hour and mixed up some KBS aluminum color - extreme temp paint.

http://www.kbs-coatings.com/XTC.html

I thinned it 20 % with high quality urethane reducer and layed on 2 medium coats about 10 minutes apart.

Then let them sit in the hot *** sun for 2 days.

Then carefully installed on engine, fired it up for 5 minutes at 1800 rpms, let cool for 10, then fired up for 20 minutes at 1800 rpms. This was not engine break-in or similar, I just like to run the motor at that speed while warming it up.

After that, within one hour, all the paint fell off like bark peeling off a tree.

See images. The dog appears to think it's a preparation issue.