what sweat said... spray can clear coats always seem to yellow.
however, if you let the paint cure for a week or so, you can then buff the paint out really well.
From what i've read on both this site, google, and at duplicolor, they claim that the Clear Coat will yellow if it is in direct sunlight before it has cured completely.
I'm leaning towards the clear coat, but i'm still not 100% sold.
A pile of stock parts from a 2005 Bonnie Black, 1969 Trident, and a 1959 Panhead.