So, Picture a stock Sporty picture from the Harley website.
Thanks and sorry again have to say - you have a talent when it comes to the painting - that is pretty intricate work, impressive. I don't think you'd have any problem doing "custom paint work" - nice little side line :)
What about trying to replicate the heat discoloration that occurs in titanium exhausts? Might not look as random as the rainbow but could give the illusion of having titanium pipes?