What do you think of this one for an electric jobber?
http://www.autogeek.net/porter-cable-7424xp.html
Im using a 2K clear too, this one was 5-Star, reletively inexpensive. But that stuff has since gone the way of non-compliant VOC here (Alberta, Canada) so I'm about to try some RM shortly which is the new stuff. Actually the clear itself seemed to come out ok (fuse untouched). Its when I started the sanding & polishing (the wing) that it took on the wonderful matt finish. But Ive also come to realize I was pretty skinny on clearing the wing worried about weight buildup. Turns out wasnt much of anything. On my next one I gained some experience, used a light source & hose-piped it on a bit heavier (knowing I would polish). A bit better but still not like yours. Someone suggested 5-star was kind of a softer material clear but Im thinking the issue is this smaller dia polisher & rpm like you say. And maybe the Farecla (water based polishing compound). Im kind of motivated to try your recipie now. Couldnt be the operator or technique ... no way...